666737403674 has 4 divisors (see below), whose sum is σ = 1000106105514. Its totient is φ = 333368701836.

The previous prime is 666737403667. The next prime is 666737403679. The reversal of 666737403674 is 476304737666.

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., 536420013649 + 130317390025 = 732407^2 + 360995^2 .

It is not an unprimeable number, because it can be changed into a prime (666737403679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166684350917 + ... + 166684350920.

Almost surely, 2^666737403674 is an apocalyptic number.

666737403674 is a deficient number, since it is larger than the sum of its proper divisors (333368701840).

666737403674 is a wasteful number, since it uses less digits than its factorization.

666737403674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333368701839.

The product of its (nonzero) digits is 64012032, while the sum is 59.

The spelling of 666737403674 in words is "six hundred sixty-six billion, seven hundred thirty-seven million, four hundred three thousand, six hundred seventy-four".