666479475883 has 4 divisors (see below), whose sum is σ = 717747127888. Its totient is φ = 615211823880.

The previous prime is 666479475853. The next prime is 666479475911. The reversal of 666479475883 is 388574974666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 388574974666 = 2 ⋅194287487333.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666479475883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666479475803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25633825983 + ... + 25633826008.

It is an arithmetic number, because the mean of its divisors is an integer number (179436781972).

Almost surely, 2^666479475883 is an apocalyptic number.

666479475883 is a deficient number, since it is larger than the sum of its proper divisors (51267652005).

666479475883 is a wasteful number, since it uses less digits than its factorization.

666479475883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51267652004.

The product of its digits is 1463132160, while the sum is 73.

The spelling of 666479475883 in words is "six hundred sixty-six billion, four hundred seventy-nine million, four hundred seventy-five thousand, eight hundred eighty-three".