56665001 has 4 divisors (see below), whose sum is σ = 56808132. Its totient is φ = 56521872.

The previous prime is 56664997. The next prime is 56665027. The reversal of 56665001 is 10056665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10056665 = 5 ⋅2011333.

It can be written as a sum of positive squares in 2 ways, for example, as 19149376 + 37515625 = 4376^2 + 6125^2 .

It is a cyclic number.

It is not a de Polignac number, because 56665001 - 2² = 56664997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56665061) 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, 70970 + ... + 71763.

It is an arithmetic number, because the mean of its divisors is an integer number (14202033).

Almost surely, 2^56665001 is an apocalyptic number.

It is an amenable number.

56665001 is a deficient number, since it is larger than the sum of its proper divisors (143131).

56665001 is a wasteful number, since it uses less digits than its factorization.

56665001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143130.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 56665001 is about 7527.6158908382. The cubic root of 56665001 is about 384.0946873885.

The spelling of 56665001 in words is "fifty-six million, six hundred sixty-five thousand, one".