655522665 has 16 divisors (see below), whose sum is σ = 1198670208. Its totient is φ = 299667456.

The previous prime is 655522663. The next prime is 655522691. The reversal of 655522665 is 566225556.

It is not a de Polignac number, because 655522665 - 2¹ = 655522663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (655522663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3121432 + ... + 3121641.

It is an arithmetic number, because the mean of its divisors is an integer number (74916888).

Almost surely, 2^655522665 is an apocalyptic number.

It is an amenable number.

655522665 is a deficient number, since it is larger than the sum of its proper divisors (543147543).

655522665 is a wasteful number, since it uses less digits than its factorization.

655522665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6243088.

The product of its digits is 540000, while the sum is 42.

The square root of 655522665 is about 25603.1768536641. The cubic root of 655522665 is about 868.6854967204.

The spelling of 655522665 in words is "six hundred fifty-five million, five hundred twenty-two thousand, six hundred sixty-five".