7638669 has 24 divisors (see below), whose sum is σ = 11461632. Its totient is φ = 4898880.

The previous prime is 7638643. The next prime is 7638689. The reversal of 7638669 is 9668367.

7638669 is a `hidden beast` number, since 7 + 638 + 6 + 6 + 9 = 666.

7638669 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7638669 - 2⁷ = 7638541 is a prime.

It is a super-2 number, since 2×7638669² = 116698528183122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7638619) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46782 + ... + 46944.

It is an arithmetic number, because the mean of its divisors is an integer number (477568).

Almost surely, 2^7638669 is an apocalyptic number.

It is an amenable number.

7638669 is a deficient number, since it is larger than the sum of its proper divisors (3822963).

7638669 is a wasteful number, since it uses less digits than its factorization.

7638669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 334 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 7638669 is about 2763.8142122798. The cubic root of 7638669 is about 196.9424020161.

The spelling of 7638669 in words is "seven million, six hundred thirty-eight thousand, six hundred sixty-nine".