667790460 has 96 divisors (see below), whose sum is σ = 2116860480. Its totient is φ = 174710016.

The previous prime is 667790381. The next prime is 667790477. The reversal of 667790460 is 64097766.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16954 + ... + 40286.

It is an arithmetic number, because the mean of its divisors is an integer number (22050630).

Almost surely, 2^667790460 is an apocalyptic number.

667790460 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 667790460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1058430240).

667790460 is an abundant number, since it is smaller than the sum of its proper divisors (1449070020).

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

667790460 is a wasteful number, since it uses less digits than its factorization.

667790460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23404 (or 23396 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 667790460 is about 25841.6419756950. The cubic root of 667790460 is about 874.0710511318.

The spelling of 667790460 in words is "six hundred sixty-seven million, seven hundred ninety thousand, four hundred sixty".