55726657 has 8 divisors (see below), whose sum is σ = 63879296. Its totient is φ = 47621952.

The previous prime is 55726651. The next prime is 55726669. The reversal of 55726657 is 75662755.

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

It is not a de Polignac number, because 55726657 - 2⁷ = 55726529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55726651) 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, 9453 + ... + 14170.

It is an arithmetic number, because the mean of its divisors is an integer number (7984912).

Almost surely, 2^55726657 is an apocalyptic number.

It is an amenable number.

55726657 is a deficient number, since it is larger than the sum of its proper divisors (8152639).

55726657 is a wasteful number, since it uses less digits than its factorization.

55726657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23967.

The product of its digits is 441000, while the sum is 43.

The square root of 55726657 is about 7465.0289349741. The cubic root of 55726657 is about 381.9627372441.

The spelling of 55726657 in words is "fifty-five million, seven hundred twenty-six thousand, six hundred fifty-seven".