665565103031434 has 4 divisors (see below), whose sum is σ = 998347654547154. Its totient is φ = 332782551515716.

The previous prime is 665565103031383. The next prime is 665565103031441. The reversal of 665565103031434 is 434130301565566.

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

It can be written as a sum of positive squares in only one way, i.e., 336783167832409 + 328781935199025 = 18351653^2 + 18132345^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166391275757857 + ... + 166391275757860.

Almost surely, 2^{665565103031434} is an apocalyptic number.

665565103031434 is a deficient number, since it is larger than the sum of its proper divisors (332782551515720).

665565103031434 is a wasteful number, since it uses less digits than its factorization.

665565103031434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332782551515719.

The product of its (nonzero) digits is 11664000, while the sum is 52.

The spelling of 665565103031434 in words is "six hundred sixty-five trillion, five hundred sixty-five billion, one hundred three million, thirty-one thousand, four hundred thirty-four".