667690560 has 112 divisors (see below), whose sum is σ = 2355494400. Its totient is φ = 178048512.

The previous prime is 667690553. The next prime is 667690561. The reversal of 667690560 is 65096766.

It is a super-2 number, since 2×667690560² = 891621367826227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (667690561) 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, 30000 + ... + 47279.

It is an arithmetic number, because the mean of its divisors is an integer number (21031200).

Almost surely, 2^667690560 is an apocalyptic number.

667690560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667690560 is an abundant number, since it is smaller than the sum of its proper divisors (1687803840).

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

667690560 is a wasteful number, since it uses less digits than its factorization.

667690560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77305 (or 77289 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 667690560 is about 25839.7089766893. The cubic root of 667690560 is about 874.0274625823.

The spelling of 667690560 in words is "six hundred sixty-seven million, six hundred ninety thousand, five hundred sixty".