667922880 has 112 divisors (see below), whose sum is σ = 2147742720. Its totient is φ = 175838208.

The previous prime is 667922873. The next prime is 667922881. The reversal of 667922880 is 88229766.

It is a happy number.

It is a super-2 number, since 2×667922880² = 892241947254988800, which contains 22 as substring.

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 (667922881) 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, 71437 + ... + 80243.

Almost surely, 2^667922880 is an apocalyptic number.

667922880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667922880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1073871360).

667922880 is an abundant number, since it is smaller than the sum of its proper divisors (1479819840).

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

667922880 is a wasteful number, since it uses less digits than its factorization.

667922880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8906 (or 8896 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 667922880 is about 25844.2039923848. The cubic root of 667922880 is about 874.1288221672.

The spelling of 667922880 in words is "six hundred sixty-seven million, nine hundred twenty-two thousand, eight hundred eighty".