666089494 has 16 divisors (see below), whose sum is σ = 1153641888. Its totient is φ = 282523392.

The previous prime is 666089491. The next prime is 666089507. The reversal of 666089494 is 494980666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666089491) 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, 243889 + ... + 246604.

It is an arithmetic number, because the mean of its divisors is an integer number (72102618).

Almost surely, 2^666089494 is an apocalyptic number.

666089494 is a deficient number, since it is larger than the sum of its proper divisors (487552394).

666089494 is a wasteful number, since it uses less digits than its factorization.

666089494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490599.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The square root of 666089494 is about 25808.7096539133. The cubic root of 666089494 is about 873.3282885645.

The spelling of 666089494 in words is "six hundred sixty-six million, eighty-nine thousand, four hundred ninety-four".