665140744647702 has 12 divisors (see below), whose sum is σ = 1441138280070060. Its totient is φ = 221713581549228.

The previous prime is 665140744647671. The next prime is 665140744647707. The reversal of 665140744647702 is 207746447041566.

665140744647702 is a `hidden beast` number, since 6 + 6 + 5 + 140 + 7 + 446 + 47 + 7 + 0 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 665140744647702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665140744647707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18476131795752 + ... + 18476131795787.

It is an arithmetic number, because the mean of its divisors is an integer number (120094856672505).

Almost surely, 2^{665140744647702} is an apocalyptic number.

665140744647702 is an abundant number, since it is smaller than the sum of its proper divisors (775997535422358).

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

665140744647702 is a wasteful number, since it uses less digits than its factorization.

665140744647702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36952263591547 (or 36952263591544 counting only the distinct ones).

The product of its (nonzero) digits is 189665280, while the sum is 63.

The spelling of 665140744647702 in words is "six hundred sixty-five trillion, one hundred forty billion, seven hundred forty-four million, six hundred forty-seven thousand, seven hundred two".