667851264 has 80 divisors (see below), whose sum is σ = 1976927040. Its totient is φ = 222612480.

The previous prime is 667851263. The next prime is 667851269. The reversal of 667851264 is 462158766.

667851264 is a `hidden beast` number, since 6 + 6 + 78 + 512 + 64 = 666.

It is not an unprimeable number, because it can be changed into a prime (667851263) by changing a digit.

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, 10332 + ... + 37979.

It is an arithmetic number, because the mean of its divisors is an integer number (24711588).

Almost surely, 2^667851264 is an apocalyptic number.

667851264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

667851264 is an abundant number, since it is smaller than the sum of its proper divisors (1309075776).

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

667851264 is an equidigital number, since it uses as much as digits as its factorization.

667851264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48338 (or 48316 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 667851264 is about 25842.8184221458. The cubic root of 667851264 is about 874.0975791155.

The spelling of 667851264 in words is "six hundred sixty-seven million, eight hundred fifty-one thousand, two hundred sixty-four".