55715665 has 8 divisors (see below), whose sum is σ = 66948480. Its totient is φ = 44512752.

The previous prime is 55715629. The next prime is 55715701. The reversal of 55715665 is 56651755.

It is an interprime number because it is at equal distance from previous prime (55715629) and next prime (55715701).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55715665 - 2¹¹ = 55713617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3145 + ... + 11014.

It is an arithmetic number, because the mean of its divisors is an integer number (8368560).

Almost surely, 2^55715665 is an apocalyptic number.

It is an amenable number.

55715665 is a deficient number, since it is larger than the sum of its proper divisors (11232815).

55715665 is a wasteful number, since it uses less digits than its factorization.

55715665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14951.

The product of its digits is 157500, while the sum is 40.

The square root of 55715665 is about 7464.2926657521. The cubic root of 55715665 is about 381.9376217325.

It can be divided in two parts, 5571 and 5665, that added together give a square (11236 = 106²).

The spelling of 55715665 in words is "fifty-five million, seven hundred fifteen thousand, six hundred sixty-five".