667701072 has 60 divisors (see below), whose sum is σ = 1914229044. Its totient is φ = 217136640.

The previous prime is 667701043. The next prime is 667701091. The reversal of 667701072 is 270107766.

667701072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 215032896 + 452668176 = 14664^2 + 21276^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50643 + ... + 62450.

Almost surely, 2^667701072 is an apocalyptic number.

It is an amenable number.

667701072 is an abundant number, since it is smaller than the sum of its proper divisors (1246527972).

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

667701072 is a wasteful number, since it uses less digits than its factorization.

667701072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113148 (or 113139 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 667701072 is about 25839.9123837524. The cubic root of 667701072 is about 874.0320494019.

The spelling of 667701072 in words is "six hundred sixty-seven million, seven hundred one thousand, seventy-two".