55501665 has 16 divisors (see below), whose sum is σ = 91203648. Its totient is φ = 28800576.

The previous prime is 55501657. The next prime is 55501669. The reversal of 55501665 is 56610555.

It is not a de Polignac number, because 55501665 - 2³ = 55501657 is a prime.

55501665 is a modest number, since divided by 1665 gives 555 as remainder.

It is not an unprimeable number, because it can be changed into a prime (55501669) 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, 49447 + ... + 50556.

It is an arithmetic number, because the mean of its divisors is an integer number (5700228).

Almost surely, 2^55501665 is an apocalyptic number.

It is an amenable number.

55501665 is a deficient number, since it is larger than the sum of its proper divisors (35701983).

55501665 is a wasteful number, since it uses less digits than its factorization.

55501665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100048.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 55501665 is about 7449.9439595208. The cubic root of 55501665 is about 381.4479956963.

The spelling of 55501665 in words is "fifty-five million, five hundred one thousand, six hundred sixty-five".