55566890 has 32 divisors (see below), whose sum is σ = 103024656. Its totient is φ = 21565440.

The previous prime is 55566869. The next prime is 55566983. The reversal of 55566890 is 9866555.

It can be written as a sum of positive squares in 8 ways, for example, as 1117249 + 54449641 = 1057^2 + 7379^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128114 + ... + 128546.

Almost surely, 2^55566890 is an apocalyptic number.

55566890 is a deficient number, since it is larger than the sum of its proper divisors (47457766).

55566890 is a wasteful number, since it uses less digits than its factorization.

55566890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794.

The product of its (nonzero) digits is 324000, while the sum is 44.

The square root of 55566890 is about 7454.3202238702. The cubic root of 55566890 is about 381.5973618199.

The spelling of 55566890 in words is "fifty-five million, five hundred sixty-six thousand, eight hundred ninety".