56666253 has 24 divisors (see below), whose sum is σ = 91736512. Its totient is φ = 30472704.

The previous prime is 56666249. The next prime is 56666263. The reversal of 56666253 is 35266665.

It is not a de Polignac number, because 56666253 - 2² = 56666249 is a prime.

It is a super-2 number, since 2×56666253² = 6422128458120018, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56666263) 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 23 ways as a sum of consecutive naturals, for example, 1401 + ... + 10737.

Almost surely, 2^56666253 is an apocalyptic number.

It is an amenable number.

56666253 is a deficient number, since it is larger than the sum of its proper divisors (35070259).

56666253 is a wasteful number, since it uses less digits than its factorization.

56666253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9381 (or 9364 counting only the distinct ones).

The product of its digits is 194400, while the sum is 39.

The square root of 56666253 is about 7527.6990508388. The cubic root of 56666253 is about 384.0975161952.

The spelling of 56666253 in words is "fifty-six million, six hundred sixty-six thousand, two hundred fifty-three".