667020328 has 32 divisors (see below), whose sum is σ = 1350757800. Its totient is φ = 306966528.

The previous prime is 667020307. The next prime is 667020331. The reversal of 667020328 is 823020766.

It can be written as a sum of positive squares in 4 ways, for example, as 302133924 + 364886404 = 17382^2 + 19102^2 .

It is a super-2 number, since 2×667020328² = 889832235930455168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667020293 and 667020302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27628 + ... + 45796.

Almost surely, 2^667020328 is an apocalyptic number.

It is an amenable number.

667020328 is an abundant number, since it is smaller than the sum of its proper divisors (683737472).

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

667020328 is a wasteful number, since it uses less digits than its factorization.

667020328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18541 (or 18537 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 667020328 is about 25826.7366889431. The cubic root of 667020328 is about 873.7349132443.

The spelling of 667020328 in words is "six hundred sixty-seven million, twenty thousand, three hundred twenty-eight".