667800402 has 16 divisors (see below), whose sum is σ = 1337593440. Its totient is φ = 222268032.

The previous prime is 667800401. The next prime is 667800407. The reversal of 667800402 is 204008766.

It is a super-2 number, since 2×667800402² = 891914753822723208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (667800401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78652 + ... + 86727.

It is an arithmetic number, because the mean of its divisors is an integer number (83599590).

Almost surely, 2^667800402 is an apocalyptic number.

667800402 is an abundant number, since it is smaller than the sum of its proper divisors (669793038).

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

667800402 is a wasteful number, since it uses less digits than its factorization.

667800402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166057.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 667800402 is about 25841.8343389164. The cubic root of 667800402 is about 874.0753888055.

The spelling of 667800402 in words is "six hundred sixty-seven million, eight hundred thousand, four hundred two".