3966914621 has 4 divisors (see below), whose sum is σ = 3997196544. Its totient is φ = 3936632700.

The previous prime is 3966914617. The next prime is 3966914663. The reversal of 3966914621 is 1264196693.

It is a happy number.

3966914621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3966914621 - 2² = 3966914617 is a prime.

It is a super-2 number, since 2×3966914621² = 31472823220607147282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3966914671) 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, 15140765 + ... + 15141026.

It is an arithmetic number, because the mean of its divisors is an integer number (999299136).

Almost surely, 2^3966914621 is an apocalyptic number.

It is an amenable number.

3966914621 is a deficient number, since it is larger than the sum of its proper divisors (30281923).

3966914621 is a wasteful number, since it uses less digits than its factorization.

3966914621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30281922.

The product of its digits is 419904, while the sum is 47.

The square root of 3966914621 is about 62983.4471984505. The cubic root of 3966914621 is about 1583.0122821726.

The spelling of 3966914621 in words is "three billion, nine hundred sixty-six million, nine hundred fourteen thousand, six hundred twenty-one".