667750072 has 64 divisors (see below), whose sum is σ = 1454112000. Its totient is φ = 284106240.

The previous prime is 667750049. The next prime is 667750129. The reversal of 667750072 is 270057766.

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, 296583 + ... + 298825.

It is an arithmetic number, because the mean of its divisors is an integer number (22720500).

Almost surely, 2^667750072 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 667750072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (727056000).

667750072 is an abundant number, since it is smaller than the sum of its proper divisors (786361928).

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

667750072 is a wasteful number, since it uses less digits than its factorization.

667750072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476 (or 2472 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 40.

The square root of 667750072 is about 25840.8605119876. The cubic root of 667750072 is about 874.0534294898.

The spelling of 667750072 in words is "six hundred sixty-seven million, seven hundred fifty thousand, seventy-two".