655765655 has 4 divisors (see below), whose sum is σ = 786918792. Its totient is φ = 524612520.

The previous prime is 655765637. The next prime is 655765681. The reversal of 655765655 is 556567556.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 655765655 - 2⁸ = 655765399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65576561 + ... + 65576570.

It is an arithmetic number, because the mean of its divisors is an integer number (196729698).

Almost surely, 2^655765655 is an apocalyptic number.

655765655 is a deficient number, since it is larger than the sum of its proper divisors (131153137).

655765655 is a wasteful number, since it uses less digits than its factorization.

655765655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131153136.

The product of its digits is 4725000, while the sum is 50.

The square root of 655765655 is about 25607.9217235605. The cubic root of 655765655 is about 868.7928186200.

The spelling of 655765655 in words is "six hundred fifty-five million, seven hundred sixty-five thousand, six hundred fifty-five".