7221526664 has 32 divisors (see below), whose sum is σ = 14917573440. Its totient is φ = 3250008000.

The previous prime is 7221526657. The next prime is 7221526667. The reversal of 7221526664 is 4666251227.

It is not an unprimeable number, because it can be changed into a prime (7221526667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397364 + ... + 415139.

It is an arithmetic number, because the mean of its divisors is an integer number (466174170).

Almost surely, 2^7221526664 is an apocalyptic number.

It is an amenable number.

7221526664 is an abundant number, since it is smaller than the sum of its proper divisors (7696046776).

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

7221526664 is a wasteful number, since it uses less digits than its factorization.

7221526664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812621 (or 812617 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 7221526664 is about 84979.5661556353. The cubic root of 7221526664 is about 1932.9012772403.

The spelling of 7221526664 in words is "seven billion, two hundred twenty-one million, five hundred twenty-six thousand, six hundred sixty-four".