56661842 has 4 divisors (see below), whose sum is σ = 84992766. Its totient is φ = 28330920.

The previous prime is 56661827. The next prime is 56661883. The reversal of 56661842 is 24816665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 53567761 + 3094081 = 7319^2 + 1759^2 .

It is a junction number, because it is equal to n+sod(n) for n = 56661796 and 56661805.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14165459 + ... + 14165462.

Almost surely, 2^56661842 is an apocalyptic number.

56661842 is a deficient number, since it is larger than the sum of its proper divisors (28330924).

56661842 is a wasteful number, since it uses less digits than its factorization.

56661842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28330923.

The product of its digits is 69120, while the sum is 38.

The square root of 56661842 is about 7527.4060605231. The cubic root of 56661842 is about 384.0875496630.

The spelling of 56661842 in words is "fifty-six million, six hundred sixty-one thousand, eight hundred forty-two".