55775657 has 8 divisors (see below), whose sum is σ = 67493376. Its totient is φ = 44995392.

The previous prime is 55775651. The next prime is 55775689. The reversal of 55775657 is 75657755.

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 55775657 - 2¹⁴ = 55759273 is a prime.

It is a super-2 number, since 2×55775657² = 6221847827563298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55775651) 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, 234233 + ... + 234470.

It is an arithmetic number, because the mean of its divisors is an integer number (8436672).

Almost surely, 2^55775657 is an apocalyptic number.

It is an amenable number.

55775657 is a deficient number, since it is larger than the sum of its proper divisors (11717719).

55775657 is a wasteful number, since it uses less digits than its factorization.

55775657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468727.

The product of its digits is 1286250, while the sum is 47.

The square root of 55775657 is about 7468.3101837029. The cubic root of 55775657 is about 382.0746566985.

The spelling of 55775657 in words is "fifty-five million, seven hundred seventy-five thousand, six hundred fifty-seven".