556665023 has 4 divisors (see below), whose sum is σ = 556712400. Its totient is φ = 556617648.

The previous prime is 556665019. The next prime is 556665029. The reversal of 556665023 is 320566655.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 320566655 = 5 ⋅64113331.

It is a cyclic number.

It is not a de Polignac number, because 556665023 - 2² = 556665019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556665029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8678 + ... + 34476.

It is an arithmetic number, because the mean of its divisors is an integer number (139178100).

Almost surely, 2^556665023 is an apocalyptic number.

556665023 is a deficient number, since it is larger than the sum of its proper divisors (47377).

556665023 is a wasteful number, since it uses less digits than its factorization.

556665023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47376.

The product of its (nonzero) digits is 162000, while the sum is 38.

The square root of 556665023 is about 23593.7496596026. The cubic root of 556665023 is about 822.6175639640.

The spelling of 556665023 in words is "five hundred fifty-six million, six hundred sixty-five thousand, twenty-three".