655320807 has 16 divisors (see below), whose sum is σ = 1013057280. Its totient is φ = 417885336.

The previous prime is 655320797. The next prime is 655320821. The reversal of 655320807 is 708023556.

655320807 is a `hidden beast` number, since 6 + 553 + 20 + 80 + 7 = 666.

It is not a de Polignac number, because 655320807 - 2²⁸ = 386885351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655320857) 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, 527013 + ... + 528254.

It is an arithmetic number, because the mean of its divisors is an integer number (63316080).

Almost surely, 2^655320807 is an apocalyptic number.

655320807 is a deficient number, since it is larger than the sum of its proper divisors (357736473).

655320807 is a wasteful number, since it uses less digits than its factorization.

655320807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055299 (or 1055293 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 655320807 is about 25599.2345002736. The cubic root of 655320807 is about 868.5963215079.

The spelling of 655320807 in words is "six hundred fifty-five million, three hundred twenty thousand, eight hundred seven".