7664621 has 4 divisors (see below), whose sum is σ = 7842912. Its totient is φ = 7486332.

The previous prime is 7664611. The next prime is 7664627. The reversal of 7664621 is 1264667.

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 7664621 - 2⁶ = 7664557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7664627) 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, 89081 + ... + 89166.

It is an arithmetic number, because the mean of its divisors is an integer number (1960728).

Almost surely, 2^7664621 is an apocalyptic number.

It is an amenable number.

7664621 is a deficient number, since it is larger than the sum of its proper divisors (178291).

7664621 is a wasteful number, since it uses less digits than its factorization.

7664621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178290.

The product of its digits is 12096, while the sum is 32.

The square root of 7664621 is about 2768.5051923376. The cubic root of 7664621 is about 197.1651839318.

It can be divided in two parts, 76646 and 21, that added together give a palindrome (76667).

The spelling of 7664621 in words is "seven million, six hundred sixty-four thousand, six hundred twenty-one".