667737473460774 has 16 divisors (see below), whose sum is σ = 1335721481036208. Its totient is φ = 222538068801152.

The previous prime is 667737473460763. The next prime is 667737473460821. The reversal of 667737473460774 is 477064374737766.

It is a self number, because there is not a number n which added to its sum of digits gives 667737473460774.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10272219567 + ... + 10272284570.

It is an arithmetic number, because the mean of its divisors is an integer number (83482592564763).

Almost surely, 2^{667737473460774} is an apocalyptic number.

667737473460774 is an abundant number, since it is smaller than the sum of its proper divisors (667984007575434).

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

667737473460774 is a wasteful number, since it uses less digits than its factorization.

667737473460774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20544509559.

The product of its (nonzero) digits is 14637417984, while the sum is 78.

The spelling of 667737473460774 in words is "six hundred sixty-seven trillion, seven hundred thirty-seven billion, four hundred seventy-three million, four hundred sixty thousand, seven hundred seventy-four".