39380666 has 24 divisors (see below), whose sum is σ = 65920764. Its totient is φ = 17539200.

The previous prime is 39380651. The next prime is 39380681. The reversal of 39380666 is 66608393.

It is an interprime number because it is at equal distance from previous prime (39380651) and next prime (39380681).

It can be written as a sum of positive squares in 6 ways, for example, as 6145441 + 33235225 = 2479^2 + 5765^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20966 + ... + 22766.

Almost surely, 2^39380666 is an apocalyptic number.

39380666 is a deficient number, since it is larger than the sum of its proper divisors (26540098).

39380666 is a wasteful number, since it uses less digits than its factorization.

39380666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874 (or 1845 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 39380666 is about 6275.4016604517. The cubic root of 39380666 is about 340.2209233159.

The spelling of 39380666 in words is "thirty-nine million, three hundred eighty thousand, six hundred sixty-six".