56666870 has 32 divisors (see below), whose sum is σ = 113641920. Its totient is φ = 20200320.

The previous prime is 56666861. The next prime is 56666891. The reversal of 56666870 is 7866665.

It is a super-2 number, since 2×56666870² = 6422268311193800, 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 15 ways as a sum of consecutive naturals, for example, 3746 + ... + 11285.

It is an arithmetic number, because the mean of its divisors is an integer number (3551310).

Almost surely, 2^56666870 is an apocalyptic number.

56666870 is an abundant number, since it is smaller than the sum of its proper divisors (56975050).

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

56666870 is a wasteful number, since it uses less digits than its factorization.

56666870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15080.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 56666870 is about 7527.7400327057. The cubic root of 56666870 is about 384.0989102484.

The spelling of 56666870 in words is "fifty-six million, six hundred sixty-six thousand, eight hundred seventy".