667664832 has 28 divisors (see below), whose sum is σ = 1766530376. Its totient is φ = 222554880.

The previous prime is 667664821. The next prime is 667664839. The reversal of 667664832 is 238466766.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667664839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1738519 + ... + 1738902.

Almost surely, 2^667664832 is an apocalyptic number.

It is an amenable number.

667664832 is an abundant number, since it is smaller than the sum of its proper divisors (1098865544).

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

667664832 is a wasteful number, since it uses less digits than its factorization.

667664832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3477436 (or 3477426 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 48.

The square root of 667664832 is about 25839.2111334692. The cubic root of 667664832 is about 874.0162361905.

The spelling of 667664832 in words is "six hundred sixty-seven million, six hundred sixty-four thousand, eight hundred thirty-two".