55610666 has 12 divisors (see below), whose sum is σ = 84002658. Its totient is φ = 27611112.

The previous prime is 55610657. The next prime is 55610693. The reversal of 55610666 is 66601655.

It can be written as a sum of positive squares in only one way, i.e., 38180041 + 17430625 = 6179^2 + 4175^2 .

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 5 ways as a sum of consecutive naturals, for example, 55280 + ... + 56276.

Almost surely, 2^55610666 is an apocalyptic number.

55610666 is a deficient number, since it is larger than the sum of its proper divisors (28391992).

55610666 is an equidigital number, since it uses as much as digits as its factorization.

55610666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333 (or 1166 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 55610666 is about 7457.2559296299. The cubic root of 55610666 is about 381.6975439086.

The spelling of 55610666 in words is "fifty-five million, six hundred ten thousand, six hundred sixty-six".