3946366639 has 8 divisors (see below), whose sum is σ = 3970134000. Its totient is φ = 3922618752.

The previous prime is 3946366607. The next prime is 3946366643. The reversal of 3946366639 is 9366636493.

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

It is a cyclic number.

It is not a de Polignac number, because 3946366639 - 2⁵ = 3946366607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3946366639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3946366679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693297 + ... + 698965.

It is an arithmetic number, because the mean of its divisors is an integer number (496266750).

Almost surely, 2^3946366639 is an apocalyptic number.

3946366639 is a deficient number, since it is larger than the sum of its proper divisors (23767361).

3946366639 is a wasteful number, since it uses less digits than its factorization.

3946366639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9737.

The product of its digits is 11337408, while the sum is 55.

The square root of 3946366639 is about 62820.1133316393. The cubic root of 3946366639 is about 1580.2742993032.

The spelling of 3946366639 in words is "three billion, nine hundred forty-six million, three hundred sixty-six thousand, six hundred thirty-nine".