1662870690 has 288 divisors, whose sum is σ = 5112446976. Its totient is φ = 372314880.

The previous prime is 1662870653. The next prime is 1662870757. The reversal of 1662870690 is 960782661.

1662870690 is a `hidden beast` number, since 16 + 628 + 7 + 0 + 6 + 9 + 0 = 666.

It is a super-2 number, since 2×1662870690² = 5530277863322152200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 13093407 + ... + 13093533.

It is an arithmetic number, because the mean of its divisors is an integer number (17751552).

Almost surely, 2^1662870690 is an apocalyptic number.

1662870690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1662870690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2556223488).

1662870690 is an abundant number, since it is smaller than the sum of its proper divisors (3449576286).

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

1662870690 is a wasteful number, since it uses less digits than its factorization.

1662870690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1662870690 is about 40778.3115148237. The cubic root of 1662870690 is about 1184.7302916602.

The spelling of 1662870690 in words is "one billion, six hundred sixty-two million, eight hundred seventy thousand, six hundred ninety".