655580339 has 4 divisors (see below), whose sum is σ = 684083856. Its totient is φ = 627076824.

The previous prime is 655580297. The next prime is 655580381. The reversal of 655580339 is 933085556.

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

It is an interprime number because it is at equal distance from previous prime (655580297) and next prime (655580381).

It is a cyclic number.

It is not a de Polignac number, because 655580339 - 2²⁰ = 654531763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 655580339.

It is not an unprimeable number, because it can be changed into a prime (655580039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14251724 + ... + 14251769.

It is an arithmetic number, because the mean of its divisors is an integer number (171020964).

Almost surely, 2^655580339 is an apocalyptic number.

655580339 is a deficient number, since it is larger than the sum of its proper divisors (28503517).

655580339 is a wasteful number, since it uses less digits than its factorization.

655580339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28503516.

The product of its (nonzero) digits is 486000, while the sum is 44.

The square root of 655580339 is about 25604.3031344343. The cubic root of 655580339 is about 868.7109721163.

The spelling of 655580339 in words is "six hundred fifty-five million, five hundred eighty thousand, three hundred thirty-nine".