7664456646 has 48 divisors (see below), whose sum is σ = 20703990528. Its totient is φ = 1990767600.

The previous prime is 7664456623. The next prime is 7664456651. The reversal of 7664456646 is 6466544667.

It is a happy number.

7664456646 is a `hidden beast` number, since 76 + 6 + 4 + 4 + 566 + 4 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 7664456592 and 7664456601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2763570 + ... + 2766341.

It is an arithmetic number, because the mean of its divisors is an integer number (431333136).

Almost surely, 2^7664456646 is an apocalyptic number.

7664456646 is an abundant number, since it is smaller than the sum of its proper divisors (13039533882).

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

7664456646 is a wasteful number, since it uses less digits than its factorization.

7664456646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5529937 (or 5529934 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 54.

The square root of 7664456646 is about 87546.8825601460. The cubic root of 7664456646 is about 1971.6377463756.

The spelling of 7664456646 in words is "seven billion, six hundred sixty-four million, four hundred fifty-six thousand, six hundred forty-six".