667474672 has 80 divisors (see below), whose sum is σ = 1455442560. Its totient is φ = 294948864.

The previous prime is 667474649. The next prime is 667474679. The reversal of 667474672 is 276474766.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667474679) 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, 290713 + ... + 292999.

It is an arithmetic number, because the mean of its divisors is an integer number (18193032).

Almost surely, 2^667474672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667474672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (727721280).

667474672 is an abundant number, since it is smaller than the sum of its proper divisors (787967888).

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

667474672 is a wasteful number, since it uses less digits than its factorization.

667474672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378 (or 2372 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 49.

The square root of 667474672 is about 25835.5311925263. The cubic root of 667474672 is about 873.9332510853.

The spelling of 667474672 in words is "six hundred sixty-seven million, four hundred seventy-four thousand, six hundred seventy-two".