55707777 has 8 divisors (see below), whose sum is σ = 82530080. Its totient is φ = 37138500.

The previous prime is 55707767. The next prime is 55707781. The reversal of 55707777 is 77770755.

55707777 is a `hidden beast` number, since 5 + 570 + 7 + 7 + 77 = 666.

It is not a de Polignac number, because 55707777 - 2⁴ = 55707761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55707767) 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, 1031599 + ... + 1031652.

It is an arithmetic number, because the mean of its divisors is an integer number (10316260).

Almost surely, 2^55707777 is an apocalyptic number.

It is an amenable number.

55707777 is a deficient number, since it is larger than the sum of its proper divisors (26822303).

55707777 is a wasteful number, since it uses less digits than its factorization.

55707777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063260 (or 2063254 counting only the distinct ones).

The product of its (nonzero) digits is 420175, while the sum is 45.

The square root of 55707777 is about 7463.7642647661. The cubic root of 55707777 is about 381.9195964839.

The spelling of 55707777 in words is "fifty-five million, seven hundred seven thousand, seven hundred seventy-seven".