667203720 has 32 divisors (see below), whose sum is σ = 2001611520. Its totient is φ = 177920960.

The previous prime is 667203707. The next prime is 667203749. The reversal of 667203720 is 27302766.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2779896 + ... + 2780135.

It is an arithmetic number, because the mean of its divisors is an integer number (62550360).

Almost surely, 2^667203720 is an apocalyptic number.

667203720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667203720 is an abundant number, since it is smaller than the sum of its proper divisors (1334407800).

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

667203720 is a wasteful number, since it uses less digits than its factorization.

667203720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560045 (or 5560041 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 33.

The square root of 667203720 is about 25830.2868741329. The cubic root of 667203720 is about 873.8149814238.

The spelling of 667203720 in words is "six hundred sixty-seven million, two hundred three thousand, seven hundred twenty".