39666742 has 8 divisors (see below), whose sum is σ = 60078096. Its totient is φ = 19640712.

The previous prime is 39666733. The next prime is 39666749. The reversal of 39666742 is 24766693.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39666749) 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, 96073 + ... + 96484.

It is an arithmetic number, because the mean of its divisors is an integer number (7509762).

Almost surely, 2^39666742 is an apocalyptic number.

39666742 is a deficient number, since it is larger than the sum of its proper divisors (20411354).

39666742 is a wasteful number, since it uses less digits than its factorization.

39666742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192662.

The product of its digits is 326592, while the sum is 43.

The square root of 39666742 is about 6298.1538564884. The cubic root of 39666742 is about 341.0427674593.

The spelling of 39666742 in words is "thirty-nine million, six hundred sixty-six thousand, seven hundred forty-two".