666431102 has 8 divisors (see below), whose sum is σ = 999885936. Its totient is φ = 333135792.

The previous prime is 666431081. The next prime is 666431147. The reversal of 666431102 is 201134666.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28823 + ... + 46514.

It is an arithmetic number, because the mean of its divisors is an integer number (124985742).

Almost surely, 2^666431102 is an apocalyptic number.

666431102 is a deficient number, since it is larger than the sum of its proper divisors (333454834).

666431102 is a wasteful number, since it uses less digits than its factorization.

666431102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79762.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 666431102 is about 25815.3268815252. The cubic root of 666431102 is about 873.4775602695.

Adding to 666431102 its reverse (201134666), we get a palindrome (867565768).

The spelling of 666431102 in words is "six hundred sixty-six million, four hundred thirty-one thousand, one hundred two".