55745665 has 8 divisors (see below), whose sum is σ = 68157288. Its totient is φ = 43754880.

The previous prime is 55745653. The next prime is 55745687. The reversal of 55745665 is 56654755.

It can be written as a sum of positive squares in 4 ways, for example, as 16507969 + 39237696 = 4063^2 + 6264^2 .

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

It is not a de Polignac number, because 55745665 - 2¹⁵ = 55712897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 104916 + ... + 105445.

It is an arithmetic number, because the mean of its divisors is an integer number (8519661).

Almost surely, 2^55745665 is an apocalyptic number.

It is an amenable number.

55745665 is a deficient number, since it is larger than the sum of its proper divisors (12411623).

55745665 is a wasteful number, since it uses less digits than its factorization.

55745665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210419.

The product of its digits is 630000, while the sum is 43.

The square root of 55745665 is about 7466.3019628193. The cubic root of 55745665 is about 382.0061606419.

The spelling of 55745665 in words is "fifty-five million, seven hundred forty-five thousand, six hundred sixty-five".