1616685660 has 72 divisors (see below), whose sum is σ = 4907653296. Its totient is φ = 430790400.

The previous prime is 1616685647. The next prime is 1616685673. The reversal of 1616685660 is 665866161.

1616685660 is a `hidden beast` number, since 16 + 16 + 68 + 566 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1616685647) and next prime (1616685673).

It is a super-2 number, since 2×1616685660² = 5227345046499271200, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321687 + ... + 326673.

Almost surely, 2^1616685660 is an apocalyptic number.

1616685660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1616685660 is an abundant number, since it is smaller than the sum of its proper divisors (3290967636).

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

1616685660 is a wasteful number, since it uses less digits than its factorization.

1616685660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6803 (or 6798 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 1616685660 is about 40208.0297950546. The cubic root of 1616685660 is about 1173.6588070978.

The spelling of 1616685660 in words is "one billion, six hundred sixteen million, six hundred eighty-five thousand, six hundred sixty".