3161666556 has 36 divisors (see below), whose sum is σ = 8033417392. Its totient is φ = 1048425984.

The previous prime is 3161666513. The next prime is 3161666587. The reversal of 3161666556 is 6556661613.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×3161666556² = 19992270822657802272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220576 + ... + 234471.

Almost surely, 2^3161666556 is an apocalyptic number.

3161666556 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3161666556 is an abundant number, since it is smaller than the sum of its proper divisors (4871750836).

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

3161666556 is a wasteful number, since it uses less digits than its factorization.

3161666556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455250 (or 455245 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 3161666556 is about 56228.6986867027. The cubic root of 3161666556 is about 1467.7047117214.

The spelling of 3161666556 in words is "three billion, one hundred sixty-one million, six hundred sixty-six thousand, five hundred fifty-six".