55999066 has 16 divisors (see below), whose sum is σ = 87821568. Its totient is φ = 26730000.

The previous prime is 55999063. The next prime is 55999079. The reversal of 55999066 is 66099955.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55999063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33736 + ... + 35356.

It is an arithmetic number, because the mean of its divisors is an integer number (5488848).

Almost surely, 2^55999066 is an apocalyptic number.

55999066 is a deficient number, since it is larger than the sum of its proper divisors (31822502).

55999066 is a wasteful number, since it uses less digits than its factorization.

55999066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397.

The product of its (nonzero) digits is 656100, while the sum is 49.

The square root of 55999066 is about 7483.2523677877. The cubic root of 55999066 is about 382.5841095454.

The spelling of 55999066 in words is "fifty-five million, nine hundred ninety-nine thousand, sixty-six".