3666139706 has 8 divisors (see below), whose sum is σ = 5505766560. Its totient is φ = 1830884188.

The previous prime is 3666139703. The next prime is 3666139727. The reversal of 3666139706 is 6079316663.

It is a happy number.

3666139706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3666139703) 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, 1090736 + ... + 1094091.

It is an arithmetic number, because the mean of its divisors is an integer number (688220820).

Almost surely, 2^3666139706 is an apocalyptic number.

3666139706 is a deficient number, since it is larger than the sum of its proper divisors (1839626854).

3666139706 is a wasteful number, since it uses less digits than its factorization.

3666139706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185668.

The product of its (nonzero) digits is 734832, while the sum is 47.

The square root of 3666139706 is about 60548.6556911051. The cubic root of 3666139706 is about 1541.9477948460.

It can be divided in two parts, 36661 and 39706, that added together give a palindrome (76367).

The spelling of 3666139706 in words is "three billion, six hundred sixty-six million, one hundred thirty-nine thousand, seven hundred six".