667670394580 has 36 divisors (see below), whose sum is σ = 1631023394868. Its totient is φ = 228915563520.

The previous prime is 667670394571. The next prime is 667670394583. The reversal of 667670394580 is 85493076766.

667670394580 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 340136236944 + 327534157636 = 583212^2 + 572306^2 .

It is a super-2 number, since 2×667670394580² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667670394583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 340647181 + ... + 340649140.

It is an arithmetic number, because the mean of its divisors is an integer number (45306205413).

Almost surely, 2^667670394580 is an apocalyptic number.

It is an amenable number.

667670394580 is an abundant number, since it is smaller than the sum of its proper divisors (963353000288).

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

667670394580 is a wasteful number, since it uses less digits than its factorization.

667670394580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681296344 (or 681296335 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 61.

The spelling of 667670394580 in words is "six hundred sixty-seven billion, six hundred seventy million, three hundred ninety-four thousand, five hundred eighty".