55566740 has 24 divisors (see below), whose sum is σ = 116992680. Its totient is φ = 22169088.

The previous prime is 55566739. The next prime is 55566743. The reversal of 55566740 is 4766555.

It can be written as a sum of positive squares in 4 ways, for example, as 6061444 + 49505296 = 2462^2 + 7036^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55566694 and 55566703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55566743) 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, 4784 + ... + 11576.

It is an arithmetic number, because the mean of its divisors is an integer number (4874695).

Almost surely, 2^55566740 is an apocalyptic number.

It is an amenable number.

55566740 is an abundant number, since it is smaller than the sum of its proper divisors (61425940).

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

55566740 is a wasteful number, since it uses less digits than its factorization.

55566740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7211 (or 7209 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 55566740 is about 7454.3101625838. The cubic root of 55566740 is about 381.5970184520.

The spelling of 55566740 in words is "fifty-five million, five hundred sixty-six thousand, seven hundred forty".