667424766 has 32 divisors (see below), whose sum is σ = 1350649728. Its totient is φ = 219850400.

The previous prime is 667424753. The next prime is 667424783.

667424766 is nontrivially palindromic in base 10.

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, 573301 + ... + 574463.

It is an arithmetic number, because the mean of its divisors is an integer number (42207804).

Almost surely, 2^667424766 is an apocalyptic number.

667424766 is an abundant number, since it is smaller than the sum of its proper divisors (683224962).

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

667424766 is a wasteful number, since it uses less digits than its factorization.

667424766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216.

The product of its digits is 2032128, while the sum is 48.

The square root of 667424766 is about 25834.5653340636. The cubic root of 667424766 is about 873.9114696846.

The spelling of 667424766 in words is "six hundred sixty-seven million, four hundred twenty-four thousand, seven hundred sixty-six".