667445274235770 has 16 divisors (see below), whose sum is σ = 1601868658165920. Its totient is φ = 177985406462864.

The previous prime is 667445274235759. The next prime is 667445274235847. The reversal of 667445274235770 is 77532472544766.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 667445274235695 and 667445274235704.

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, 11124087903900 + ... + 11124087903959.

It is an arithmetic number, because the mean of its divisors is an integer number (100116791135370).

Almost surely, 2^{667445274235770} is an apocalyptic number.

667445274235770 is an abundant number, since it is smaller than the sum of its proper divisors (934423383930150).

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

667445274235770 is a wasteful number, since it uses less digits than its factorization.

667445274235770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22248175807869.

The product of its (nonzero) digits is 1659571200, while the sum is 69.

The spelling of 667445274235770 in words is "six hundred sixty-seven trillion, four hundred forty-five billion, two hundred seventy-four million, two hundred thirty-five thousand, seven hundred seventy".