55664616 has 32 divisors (see below), whose sum is σ = 159042240. Its totient is φ = 15904128.

The previous prime is 55664611. The next prime is 55664629. The reversal of 55664616 is 61646655.

It is not an unprimeable number, because it can be changed into a prime (55664611) 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, 165501 + ... + 165836.

It is an arithmetic number, because the mean of its divisors is an integer number (4970070).

Almost surely, 2^55664616 is an apocalyptic number.

55664616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

55664616 is an abundant number, since it is smaller than the sum of its proper divisors (103377624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55664616 is a wasteful number, since it uses less digits than its factorization.

55664616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331353 (or 331349 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 55664616 is about 7460.8723350557. The cubic root of 55664616 is about 381.8209370653.

It can be divided in two parts, 55664 and 616, that added together give a triangular number (56280 = T₃₃₅).

The spelling of 55664616 in words is "fifty-five million, six hundred sixty-four thousand, six hundred sixteen".