667137845 has 16 divisors (see below), whose sum is σ = 873877248. Its totient is φ = 484895040.

The previous prime is 667137829. The next prime is 667137869. The reversal of 667137845 is 548731766.

It is not a de Polignac number, because 667137845 - 2⁴ = 667137829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 667137845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132107 + ... + 137063.

It is an arithmetic number, because the mean of its divisors is an integer number (54617328).

Almost surely, 2^667137845 is an apocalyptic number.

It is an amenable number.

667137845 is a deficient number, since it is larger than the sum of its proper divisors (206739403).

667137845 is a wasteful number, since it uses less digits than its factorization.

667137845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7420.

The product of its digits is 846720, while the sum is 47.

The square root of 667137845 is about 25829.0116922812. The cubic root of 667137845 is about 873.7862223633.

The spelling of 667137845 in words is "six hundred sixty-seven million, one hundred thirty-seven thousand, eight hundred forty-five".