56666043 has 24 divisors (see below), whose sum is σ = 97613568. Its totient is φ = 30971952.

The previous prime is 56666017. The next prime is 56666053. The reversal of 56666043 is 34066665.

It is not a de Polignac number, because 56666043 - 2²⁰ = 55617467 is a prime.

It is a super-2 number, since 2×56666043² = 6422080858555698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56665989 and 56666007.

It is not an unprimeable number, because it can be changed into a prime (56666053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18105 + ... + 21002.

It is an arithmetic number, because the mean of its divisors is an integer number (4067232).

Almost surely, 2^56666043 is an apocalyptic number.

56666043 is a deficient number, since it is larger than the sum of its proper divisors (40947525).

56666043 is a wasteful number, since it uses less digits than its factorization.

56666043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39143 (or 39140 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 56666043 is about 7527.6851023406. The cubic root of 56666043 is about 384.0970417177.

The spelling of 56666043 in words is "fifty-six million, six hundred sixty-six thousand, forty-three".