1566166056 has 64 divisors (see below), whose sum is σ = 4818979200. Its totient is φ = 413054208.

The previous prime is 1566166039. The next prime is 1566166061. The reversal of 1566166056 is 6506616651.

It is a super-2 number, since 2×1566166056² = 4905752229933190272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1566165999 and 1566166017.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356371 + ... + 360738.

It is an arithmetic number, because the mean of its divisors is an integer number (75296550).

Almost surely, 2^1566166056 is an apocalyptic number.

It is an amenable number.

1566166056 is an abundant number, since it is smaller than the sum of its proper divisors (3252813144).

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

1566166056 is a wasteful number, since it uses less digits than its factorization.

1566166056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717138 (or 717134 counting only the distinct ones).

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

The square root of 1566166056 is about 39574.8159313470. The cubic root of 1566166056 is about 1161.3040368609.

The spelling of 1566166056 in words is "one billion, five hundred sixty-six million, one hundred sixty-six thousand, fifty-six".