7663994 has 16 divisors (see below), whose sum is σ = 12436200. Its totient is φ = 3521280.

The previous prime is 7663993. The next prime is 7664009. The reversal of 7663994 is 4993667.

It can be written as a sum of positive squares in 4 ways, for example, as 7155625 + 508369 = 2675^2 + 713^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7663993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6782 + ... + 7830.

Almost surely, 2^7663994 is an apocalyptic number.

7663994 is a deficient number, since it is larger than the sum of its proper divisors (4772206).

7663994 is a wasteful number, since it uses less digits than its factorization.

7663994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345.

The product of its digits is 244944, while the sum is 44.

The square root of 7663994 is about 2768.3919520184. The cubic root of 7663994 is about 197.1598074563.

The spelling of 7663994 in words is "seven million, six hundred sixty-three thousand, nine hundred ninety-four".