1616665506 has 16 divisors (see below), whose sum is σ = 3312193248. Its totient is φ = 525744800.

The previous prime is 1616665441. The next prime is 1616665537. The reversal of 1616665506 is 6055666161.

It is a super-2 number, since 2×1616665506² = 5227214716580472072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3285660 + ... + 3286151.

It is an arithmetic number, because the mean of its divisors is an integer number (207012078).

Almost surely, 2^1616665506 is an apocalyptic number.

1616665506 is an abundant number, since it is smaller than the sum of its proper divisors (1695527742).

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

1616665506 is a wasteful number, since it uses less digits than its factorization.

1616665506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6571857.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 1616665506 is about 40207.7791726924. The cubic root of 1616665506 is about 1173.6539300380.

The spelling of 1616665506 in words is "one billion, six hundred sixteen million, six hundred sixty-five thousand, five hundred six".