56665701 has 12 divisors (see below), whose sum is σ = 83754528. Its totient is φ = 36898344.

The previous prime is 56665699. The next prime is 56665703. The reversal of 56665701 is 10756665.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56665699) and next prime (56665703).

It is not a de Polignac number, because 56665701 - 2¹ = 56665699 is a prime.

It is a super-2 number, since 2×56665701² = 6422003339642802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56665703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72825 + ... + 73598.

It is an arithmetic number, because the mean of its divisors is an integer number (6979544).

Almost surely, 2^56665701 is an apocalyptic number.

It is an amenable number.

56665701 is a deficient number, since it is larger than the sum of its proper divisors (27088827).

56665701 is a wasteful number, since it uses less digits than its factorization.

56665701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146472 (or 146469 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 56665701 is about 7527.6623861595. The cubic root of 56665701 is about 384.0962689948.

The spelling of 56665701 in words is "fifty-six million, six hundred sixty-five thousand, seven hundred one".