667253420 has 24 divisors (see below), whose sum is σ = 1424984400. Its totient is φ = 262377152.

The previous prime is 667253401. The next prime is 667253443. The reversal of 667253420 is 24352766.

It is an unprimeable number.

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, 281555 + ... + 283914.

It is an arithmetic number, because the mean of its divisors is an integer number (59374350).

Almost surely, 2^667253420 is an apocalyptic number.

It is an amenable number.

667253420 is an abundant number, since it is smaller than the sum of its proper divisors (757730980).

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

667253420 is a wasteful number, since it uses less digits than its factorization.

667253420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565537 (or 565535 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 667253420 is about 25831.2489051536. The cubic root of 667253420 is about 873.8366777089.

The spelling of 667253420 in words is "six hundred sixty-seven million, two hundred fifty-three thousand, four hundred twenty".