7944661933 has 18 divisors (see below), whose sum is σ = 8724082094. Its totient is φ = 7192031088.

The previous prime is 7944661877. The next prime is 7944661973. The reversal of 7944661933 is 3391664497.

7944661933 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5500150569 + 2444511364 = 74163^2 + 49442^2 .

It is not a de Polignac number, because 7944661933 - 2⁹ = 7944661421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7944661973) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18960798 + ... + 18961216.

Almost surely, 2^7944661933 is an apocalyptic number.

It is an amenable number.

7944661933 is a deficient number, since it is larger than the sum of its proper divisors (779420161).

7944661933 is an frugal number, since it uses more digits than its factorization.

7944661933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969 (or 491 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 52.

The square root of 7944661933 is about 89132.8330807453. The cubic root of 7944661933 is about 1995.3778203736.

Multiplying 7944661933 by its sum of digits (52), we get a square (413122420516 = 642746²).

The spelling of 7944661933 in words is "seven billion, nine hundred forty-four million, six hundred sixty-one thousand, nine hundred thirty-three".