1666163100 has 288 divisors, whose sum is σ = 5774630400. Its totient is φ = 362880000.

The previous prime is 1666163041. The next prime is 1666163131. The reversal of 1666163100 is 13616661.

1666163100 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1666163100² = 5552198951603220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6637975 + ... + 6638225.

It is an arithmetic number, because the mean of its divisors is an integer number (20050800).

Almost surely, 2^1666163100 is an apocalyptic number.

1666163100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666163100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2887315200).

1666163100 is an abundant number, since it is smaller than the sum of its proper divisors (4108467300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666163100 is a wasteful number, since it uses less digits than its factorization.

1666163100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1666163100 is about 40818.6611735368. The cubic root of 1666163100 is about 1185.5116806083.

Adding to 1666163100 its reverse (13616661), we get a palindrome (1679779761).

The spelling of 1666163100 in words is "one billion, six hundred sixty-six million, one hundred sixty-three thousand, one hundred".