139494666 has 16 divisors (see below), whose sum is σ = 285477984. Its totient is φ = 45416784.

The previous prime is 139494647. The next prime is 139494671. The reversal of 139494666 is 666494931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270081 + ... + 270596.

It is an arithmetic number, because the mean of its divisors is an integer number (17842374).

Almost surely, 2^139494666 is an apocalyptic number.

139494666 is an abundant number, since it is smaller than the sum of its proper divisors (145983318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139494666 is a wasteful number, since it uses less digits than its factorization.

139494666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540725.

The product of its digits is 839808, while the sum is 48.

The square root of 139494666 is about 11810.7860026334. The cubic root of 139494666 is about 518.6239084643.

The spelling of 139494666 in words is "one hundred thirty-nine million, four hundred ninety-four thousand, six hundred sixty-six".