55990663 has 16 divisors (see below), whose sum is σ = 60220800. Its totient is φ = 51904800.

The previous prime is 55990637. The next prime is 55990679. The reversal of 55990663 is 36609955.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55990663 - 2¹³ = 55982471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55990603) 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, 312708 + ... + 312886.

It is an arithmetic number, because the mean of its divisors is an integer number (3763800).

Almost surely, 2^55990663 is an apocalyptic number.

55990663 is a deficient number, since it is larger than the sum of its proper divisors (4230137).

55990663 is a wasteful number, since it uses less digits than its factorization.

55990663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462.

The product of its (nonzero) digits is 218700, while the sum is 43.

The square root of 55990663 is about 7482.6908929876. The cubic root of 55990663 is about 382.5649722316.

The spelling of 55990663 in words is "fifty-five million, nine hundred ninety thousand, six hundred sixty-three".