1666600100 has 72 divisors (see below), whose sum is σ = 4177420128. Its totient is φ = 570380800.

The previous prime is 1666600069. The next prime is 1666600109. The reversal of 1666600100 is 10066661.

It is a self number, because there is not a number n which added to its sum of digits gives 1666600100.

It is not an unprimeable number, because it can be changed into a prime (1666600109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25862 + ... + 63261.

It is an arithmetic number, because the mean of its divisors is an integer number (58019724).

Almost surely, 2^1666600100 is an apocalyptic number.

1666600100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666600100 is an abundant number, since it is smaller than the sum of its proper divisors (2510820028).

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

1666600100 is a wasteful number, since it uses less digits than its factorization.

1666600100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89165 (or 89158 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1666600100 is about 40824.0137664096. The cubic root of 1666600100 is about 1185.6153165845.

Adding to 1666600100 its reverse (10066661), we get a palindrome (1676666761).

The spelling of 1666600100 in words is "one billion, six hundred sixty-six million, six hundred thousand, one hundred".