39672433666 has 8 divisors (see below), whose sum is σ = 61560673020. Its totient is φ = 19152209328.

The previous prime is 39672433663. The next prime is 39672433667. The reversal of 39672433666 is 66633427693.

It can be written as a sum of positive squares in 2 ways, for example, as 39332805625 + 339628041 = 198325^2 + 18429^2 .

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

It is not an unprimeable number, because it can be changed into a prime (39672433663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342003681 + ... + 342003796.

Almost surely, 2^39672433666 is an apocalyptic number.

39672433666 is a deficient number, since it is larger than the sum of its proper divisors (21888239354).

39672433666 is a wasteful number, since it uses less digits than its factorization.

39672433666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684007508.

The product of its digits is 17635968, while the sum is 55.

The spelling of 39672433666 in words is "thirty-nine billion, six hundred seventy-two million, four hundred thirty-three thousand, six hundred sixty-six".