667672405 has 8 divisors (see below), whose sum is σ = 836042112. Its totient is φ = 510914448.

The previous prime is 667672373. The next prime is 667672469. The reversal of 667672405 is 504276766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667672405 - 2⁵ = 667672373 is a prime.

It is a Duffinian number.

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, 2902809 + ... + 2903038.

It is an arithmetic number, because the mean of its divisors is an integer number (104505264).

Almost surely, 2^667672405 is an apocalyptic number.

It is an amenable number.

667672405 is a deficient number, since it is larger than the sum of its proper divisors (168369707).

667672405 is a wasteful number, since it uses less digits than its factorization.

667672405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5805875.

The product of its (nonzero) digits is 423360, while the sum is 43.

The square root of 667672405 is about 25839.3576739051. The cubic root of 667672405 is about 874.0195406928.

The spelling of 667672405 in words is "six hundred sixty-seven million, six hundred seventy-two thousand, four hundred five".