667600407 has 16 divisors (see below), whose sum is σ = 1020943360. Its totient is φ = 430709400.

The previous prime is 667600343. The next prime is 667600411. The reversal of 667600407 is 704006766.

667600407 is a `hidden beast` number, since 6 + 6 + 7 + 600 + 40 + 7 = 666.

It is not a de Polignac number, because 667600407 - 2⁶ = 667600343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667600447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397969 + ... + 399642.

It is an arithmetic number, because the mean of its divisors is an integer number (63808960).

Almost surely, 2^667600407 is an apocalyptic number.

667600407 is a deficient number, since it is larger than the sum of its proper divisors (353342953).

667600407 is a wasteful number, since it uses less digits than its factorization.

667600407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797651 (or 797645 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 667600407 is about 25837.9644515585. The cubic root of 667600407 is about 873.9881231291.

The spelling of 667600407 in words is "six hundred sixty-seven million, six hundred thousand, four hundred seven".