55620757 has 8 divisors (see below), whose sum is σ = 56131712. Its totient is φ = 55112400.

The previous prime is 55620749. The next prime is 55620779. The reversal of 55620757 is 75702655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55620757 - 2³ = 55620749 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 (55620737) 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, 87832 + ... + 88462.

It is an arithmetic number, because the mean of its divisors is an integer number (7016464).

Almost surely, 2^55620757 is an apocalyptic number.

It is an amenable number.

55620757 is a deficient number, since it is larger than the sum of its proper divisors (510955).

55620757 is a wasteful number, since it uses less digits than its factorization.

55620757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299.

The product of its (nonzero) digits is 73500, while the sum is 37.

The square root of 55620757 is about 7457.9324882973. The cubic root of 55620757 is about 381.7206298694.

The spelling of 55620757 in words is "fifty-five million, six hundred twenty thousand, seven hundred fifty-seven".