667107028 has 24 divisors (see below), whose sum is σ = 1334894400. Its totient is φ = 285757248.

The previous prime is 667106989. The next prime is 667107029. The reversal of 667107028 is 820701766.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667107029) 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, 64008 + ... + 73696.

It is an arithmetic number, because the mean of its divisors is an integer number (55620600).

Almost surely, 2^667107028 is an apocalyptic number.

It is an amenable number.

667107028 is an abundant number, since it is smaller than the sum of its proper divisors (667787372).

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

667107028 is a wasteful number, since it uses less digits than its factorization.

667107028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12159 (or 12157 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 667107028 is about 25828.4151275296. The cubic root of 667107028 is about 873.7727679302.

The spelling of 667107028 in words is "six hundred sixty-seven million, one hundred seven thousand, twenty-eight".