666331461 has 8 divisors (see below), whose sum is σ = 987157760. Its totient is φ = 444220956.

The previous prime is 666331447. The next prime is 666331469. The reversal of 666331461 is 164133666.

It is not a de Polignac number, because 666331461 - 2⁵ = 666331429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666331469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12339445 + ... + 12339498.

It is an arithmetic number, because the mean of its divisors is an integer number (123394720).

Almost surely, 2^666331461 is an apocalyptic number.

It is an amenable number.

666331461 is a deficient number, since it is larger than the sum of its proper divisors (320826299).

666331461 is a wasteful number, since it uses less digits than its factorization.

666331461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24678952 (or 24678946 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 666331461 is about 25813.3969287268. The cubic root of 666331461 is about 873.4340256289.

The spelling of 666331461 in words is "six hundred sixty-six million, three hundred thirty-one thousand, four hundred sixty-one".