665609408298 has 48 divisors (see below), whose sum is σ = 1505085795720. Its totient is φ = 212323356672.

The previous prime is 665609408257. The next prime is 665609408363. The reversal of 665609408298 is 892804906566.

665609408298 is a `hidden beast` number, since 6 + 6 + 560 + 9 + 40 + 8 + 29 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 164392135209 + 501217273089 = 405453^2 + 707967^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5583111 + ... + 5701082.

Almost surely, 2^665609408298 is an apocalyptic number.

665609408298 is an abundant number, since it is smaller than the sum of its proper divisors (839476387422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665609408298 is a wasteful number, since it uses less digits than its factorization.

665609408298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11284343 (or 11284340 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 665609408298 in words is "six hundred sixty-five billion, six hundred nine million, four hundred eight thousand, two hundred ninety-eight".