655620507 has 8 divisors (see below), whose sum is σ = 971289680. Its totient is φ = 437080320.

The previous prime is 655620499. The next prime is 655620509. The reversal of 655620507 is 705026556.

It is not a de Polignac number, because 655620507 - 2³ = 655620499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655620509) 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, 12141094 + ... + 12141147.

It is an arithmetic number, because the mean of its divisors is an integer number (121411210).

Almost surely, 2^655620507 is an apocalyptic number.

655620507 is a deficient number, since it is larger than the sum of its proper divisors (315669173).

655620507 is a wasteful number, since it uses less digits than its factorization.

655620507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24282250 (or 24282244 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 655620507 is about 25605.0875218188. The cubic root of 655620507 is about 868.7287139894.

The spelling of 655620507 in words is "six hundred fifty-five million, six hundred twenty thousand, five hundred seven".