667066544 has 10 divisors (see below), whose sum is σ = 1292441460. Its totient is φ = 333533264.

The previous prime is 667066529. The next prime is 667066549. The reversal of 667066544 is 445660766.

It is a junction number, because it is equal to n+sod(n) for n = 667066495 and 667066504.

It is not an unprimeable number, because it can be changed into a prime (667066549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20845814 + ... + 20845845.

It is an arithmetic number, because the mean of its divisors is an integer number (129244146).

Almost surely, 2^667066544 is an apocalyptic number.

It is an amenable number.

667066544 is a deficient number, since it is larger than the sum of its proper divisors (625374916).

667066544 is a wasteful number, since it uses less digits than its factorization.

667066544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41691667 (or 41691661 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 44.

The square root of 667066544 is about 25827.6314051444. The cubic root of 667066544 is about 873.7550923395.

The spelling of 667066544 in words is "six hundred sixty-seven million, sixty-six thousand, five hundred forty-four".