7664520 has 64 divisors (see below), whose sum is σ = 24001920. Its totient is φ = 1954304.

The previous prime is 7664519. The next prime is 7664537. The reversal of 7664520 is 254667.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1372 + ... + 4148.

It is an arithmetic number, because the mean of its divisors is an integer number (375030).

Almost surely, 2^7664520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7664520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12000960).

7664520 is an abundant number, since it is smaller than the sum of its proper divisors (16337400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7664520 is a wasteful number, since it uses less digits than its factorization.

7664520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814 (or 2810 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 7664520 is about 2768.4869513870. The cubic root of 7664520 is about 197.1643178846.

The spelling of 7664520 in words is "seven million, six hundred sixty-four thousand, five hundred twenty".