7664985 has 24 divisors (see below), whose sum is σ = 13515840. Its totient is φ = 4017312.

The previous prime is 7664983. The next prime is 7665017. The reversal of 7664985 is 5894667.

It is not a de Polignac number, because 7664985 - 2¹ = 7664983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 7664985.

It is not an unprimeable number, because it can be changed into a prime (7664983) 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, 1212 + ... + 4098.

It is an arithmetic number, because the mean of its divisors is an integer number (563160).

Almost surely, 2^7664985 is an apocalyptic number.

It is an amenable number.

7664985 is a deficient number, since it is larger than the sum of its proper divisors (5850855).

7664985 is a wasteful number, since it uses less digits than its factorization.

7664985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957 (or 2954 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 7664985 is about 2768.5709310039. The cubic root of 7664985 is about 197.1683050685.

It can be divided in two parts, 7664 and 985, that added together give a square (8649 = 93²).

The spelling of 7664985 in words is "seven million, six hundred sixty-four thousand, nine hundred eighty-five".