55706665 has 16 divisors (see below), whose sum is σ = 77447808. Its totient is φ = 37673856.

The previous prime is 55706663. The next prime is 55706669. The reversal of 55706665 is 56660755.

It is a cyclic number.

It is not a de Polignac number, because 55706665 - 2¹ = 55706663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55706663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8347 + ... + 13456.

It is an arithmetic number, because the mean of its divisors is an integer number (4840488).

Almost surely, 2^55706665 is an apocalyptic number.

It is an amenable number.

55706665 is a deficient number, since it is larger than the sum of its proper divisors (21741143).

55706665 is a wasteful number, since it uses less digits than its factorization.

55706665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21888.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 55706665 is about 7463.6897711521. The cubic root of 55706665 is about 381.9170552623.

The spelling of 55706665 in words is "fifty-five million, seven hundred six thousand, six hundred sixty-five".