667765760 has 44 divisors (see below), whose sum is σ = 1601867568. Its totient is φ = 267104256.

The previous prime is 667765741. The next prime is 667765783. The reversal of 667765760 is 67567766.

It is a super-2 number, since 2×667765760² = 891822220456755200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667765699 and 667765708.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60092 + ... + 70331.

Almost surely, 2^667765760 is an apocalyptic number.

It is an amenable number.

667765760 is an abundant number, since it is smaller than the sum of its proper divisors (934101808).

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

667765760 is a wasteful number, since it uses less digits than its factorization.

667765760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130448 (or 130430 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 50.

The square root of 667765760 is about 25841.1640604676. The cubic root of 667765760 is about 874.0602743875.

The spelling of 667765760 in words is "six hundred sixty-seven million, seven hundred sixty-five thousand, seven hundred sixty".