7662640 has 20 divisors (see below), whose sum is σ = 17815824. Its totient is φ = 3065024.

The previous prime is 7662619. The next prime is 7662647. The reversal of 7662640 is 462667.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (7662647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47812 + ... + 47971.

Almost surely, 2^7662640 is an apocalyptic number.

It is an amenable number.

7662640 is an abundant number, since it is smaller than the sum of its proper divisors (10153184).

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

7662640 is a wasteful number, since it uses less digits than its factorization.

7662640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95796 (or 95790 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 7662640 is about 2768.1473949196. The cubic root of 7662640 is about 197.1481960127.

The spelling of 7662640 in words is "seven million, six hundred sixty-two thousand, six hundred forty".