1616055666 has 32 divisors (see below), whose sum is σ = 3480252480. Its totient is φ = 498402816.

The previous prime is 1616055589. The next prime is 1616055671. The reversal of 1616055666 is 6665506161.

It is a super-2 number, since 2×1616055666² = 5223271831221407112, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128251 + ... + 140286.

It is an arithmetic number, because the mean of its divisors is an integer number (108757890).

Almost surely, 2^1616055666 is an apocalyptic number.

1616055666 is an abundant number, since it is smaller than the sum of its proper divisors (1864196814).

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

1616055666 is a wasteful number, since it uses less digits than its factorization.

1616055666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268618.

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

The square root of 1616055666 is about 40200.1948502740. The cubic root of 1616055666 is about 1173.5063358848.

The spelling of 1616055666 in words is "one billion, six hundred sixteen million, fifty-five thousand, six hundred sixty-six".