7766664620 has 48 divisors (see below), whose sum is σ = 19161400608. Its totient is φ = 2606991360.

The previous prime is 7766664613. The next prime is 7766664649. The reversal of 7766664620 is 264666677.

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, 1354949 + ... + 1360668.

It is an arithmetic number, because the mean of its divisors is an integer number (399195846).

Almost surely, 2^7766664620 is an apocalyptic number.

It is an amenable number.

7766664620 is an abundant number, since it is smaller than the sum of its proper divisors (11394735988).

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

7766664620 is a wasteful number, since it uses less digits than its factorization.

7766664620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715650 (or 2715648 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 50.

The square root of 7766664620 is about 88128.6821642080. The cubic root of 7766664620 is about 1980.3632143250.

The spelling of 7766664620 in words is "seven billion, seven hundred sixty-six million, six hundred sixty-four thousand, six hundred twenty".