56660403 has 16 divisors (see below), whose sum is σ = 78923520. Its totient is φ = 36111264.

The previous prime is 56660393. The next prime is 56660407. The reversal of 56660403 is 30406665.

It is not a de Polignac number, because 56660403 - 2⁹ = 56659891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56660407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5800 + ... + 12122.

It is an arithmetic number, because the mean of its divisors is an integer number (4932720).

Almost surely, 2^56660403 is an apocalyptic number.

56660403 is a deficient number, since it is larger than the sum of its proper divisors (22263117).

56660403 is a wasteful number, since it uses less digits than its factorization.

56660403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6458.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 56660403 is about 7527.3104758606. The cubic root of 56660403 is about 384.0842981705.

The spelling of 56660403 in words is "fifty-six million, six hundred sixty thousand, four hundred three".