666605070801 has 12 divisors (see below), whose sum is σ = 985266410128. Its totient is φ = 434068417944.

The previous prime is 666605070737. The next prime is 666605070823. The reversal of 666605070801 is 108070506666.

It is not a de Polignac number, because 666605070801 - 2⁶ = 666605070737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (666605071801) 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, 861246475 + ... + 861247248.

Almost surely, 2^666605070801 is an apocalyptic number.

It is an amenable number.

666605070801 is a deficient number, since it is larger than the sum of its proper divisors (318661339327).

666605070801 is a wasteful number, since it uses less digits than its factorization.

666605070801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722493772 (or 1722493769 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 666605070801 in words is "six hundred sixty-six billion, six hundred five million, seventy thousand, eight hundred one".