666628467670 has 32 divisors (see below), whose sum is σ = 1309382218656. Its totient is φ = 242342515200.

The previous prime is 666628467619. The next prime is 666628467671. The reversal of 666628467670 is 76764826666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666628467671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452259 + ... + 1240078.

It is an arithmetic number, because the mean of its divisors is an integer number (40918194333).

Almost surely, 2^666628467670 is an apocalyptic number.

666628467670 is a deficient number, since it is larger than the sum of its proper divisors (642753750986).

666628467670 is a wasteful number, since it uses less digits than its factorization.

666628467670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695936.

The product of its (nonzero) digits is 146313216, while the sum is 64.

The spelling of 666628467670 in words is "six hundred sixty-six billion, six hundred twenty-eight million, four hundred sixty-seven thousand, six hundred seventy".