667334520 has 96 divisors (see below), whose sum is σ = 2238837120. Its totient is φ = 172212480.

The previous prime is 667334441. The next prime is 667334527. The reversal of 667334520 is 25433766.

667334520 is a `hidden beast` number, since 66 + 73 + 3 + 4 + 520 = 666.

It is a super-5 number, since 5×667334520⁵ (a number of 45 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667334527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18739 + ... + 41058.

It is an arithmetic number, because the mean of its divisors is an integer number (23321220).

Almost surely, 2^667334520 is an apocalyptic number.

667334520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667334520 is an abundant number, since it is smaller than the sum of its proper divisors (1571502600).

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

667334520 is a wasteful number, since it uses less digits than its factorization.

667334520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59845 (or 59838 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The square root of 667334520 is about 25832.8186615398. The cubic root of 667334520 is about 873.8720791928.

It can be divided in two parts, 66733 and 4520, that added together give a triangular number (71253 = T₃₇₇).

The spelling of 667334520 in words is "six hundred sixty-seven million, three hundred thirty-four thousand, five hundred twenty".