665664155314 has 8 divisors (see below), whose sum is σ = 998499788460. Its totient is φ = 332830892496.

The previous prime is 665664155249. The next prime is 665664155327. The reversal of 665664155314 is 413551466566.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 607035765625 + 58628389689 = 779125^2 + 242133^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×665664155314² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550492 + ... + 1278424.

Almost surely, 2^665664155314 is an apocalyptic number.

665664155314 is a deficient number, since it is larger than the sum of its proper divisors (332835633146).

665664155314 is a wasteful number, since it uses less digits than its factorization.

665664155314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185164.

The product of its digits is 7776000, while the sum is 52.

The spelling of 665664155314 in words is "six hundred sixty-five billion, six hundred sixty-four million, one hundred fifty-five thousand, three hundred fourteen".