666034631 has 4 divisors (see below), whose sum is σ = 667019112. Its totient is φ = 665050152.

The previous prime is 666034601. The next prime is 666034673. The reversal of 666034631 is 136430666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666034631 is a prime.

It is a super-2 number, since 2×666034631² = 887204259382612322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666034591 and 666034600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666034601) 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 3 ways as a sum of consecutive naturals, for example, 491225 + ... + 492578.

It is an arithmetic number, because the mean of its divisors is an integer number (166754778).

Almost surely, 2^666034631 is an apocalyptic number.

666034631 is a deficient number, since it is larger than the sum of its proper divisors (984481).

666034631 is an equidigital number, since it uses as much as digits as its factorization.

666034631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984480.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 666034631 is about 25807.6467544021. The cubic root of 666034631 is about 873.3043104425.

The spelling of 666034631 in words is "six hundred sixty-six million, thirty-four thousand, six hundred thirty-one".