666476961 has 8 divisors (see below), whose sum is σ = 905402880. Its totient is φ = 435934512.

The previous prime is 666476953. The next prime is 666476963. The reversal of 666476961 is 169674666.

666476961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 666476961 - 2³ = 666476953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666476963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2095681 + ... + 2095998.

It is an arithmetic number, because the mean of its divisors is an integer number (113175360).

Almost surely, 2^666476961 is an apocalyptic number.

It is an amenable number.

666476961 is a deficient number, since it is larger than the sum of its proper divisors (238925919).

666476961 is a wasteful number, since it uses less digits than its factorization.

666476961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4191735.

The product of its digits is 1959552, while the sum is 51.

The square root of 666476961 is about 25816.2150788995. The cubic root of 666476961 is about 873.4975952932.

The spelling of 666476961 in words is "six hundred sixty-six million, four hundred seventy-six thousand, nine hundred sixty-one".