56664406 has 8 divisors (see below), whose sum is σ = 85242600. Its totient is φ = 28250208.

The previous prime is 56664401. The next prime is 56664407. The reversal of 56664406 is 60446665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56664401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40131 + ... + 41518.

It is an arithmetic number, because the mean of its divisors is an integer number (10655325).

Almost surely, 2^56664406 is an apocalyptic number.

56664406 is a deficient number, since it is larger than the sum of its proper divisors (28578194).

56664406 is a wasteful number, since it uses less digits than its factorization.

56664406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81998.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 56664406 is about 7527.5763695894. The cubic root of 56664406 is about 384.0933430128.

The spelling of 56664406 in words is "fifty-six million, six hundred sixty-four thousand, four hundred six".