55666260 has 72 divisors (see below), whose sum is σ = 181850760. Its totient is φ = 13701888.

The previous prime is 55666249. The next prime is 55666267. The reversal of 55666260 is 6266655.

It can be written as a sum of positive squares in 4 ways, for example, as 133956 + 55532304 = 366^2 + 7452^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55666267) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9555 + ... + 14234.

It is an arithmetic number, because the mean of its divisors is an integer number (2525705).

Almost surely, 2^55666260 is an apocalyptic number.

It is an amenable number.

55666260 is an abundant number, since it is smaller than the sum of its proper divisors (126184500).

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

55666260 is a wasteful number, since it uses less digits than its factorization.

55666260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23817 (or 23812 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 55666260 is about 7460.9825090265. The cubic root of 55666260 is about 381.8246959309.

The spelling of 55666260 in words is "fifty-five million, six hundred sixty-six thousand, two hundred sixty".