7720660466 has 16 divisors (see below), whose sum is σ = 12400008120. Its totient is φ = 3592427520.

The previous prime is 7720660457. The next prime is 7720660471. The reversal of 7720660466 is 6640660277.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7693921225 + 26739241 = 87715^2 + 5171^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1272695 + ... + 1278746.

Almost surely, 2^7720660466 is an apocalyptic number.

7720660466 is a deficient number, since it is larger than the sum of its proper divisors (4679347654).

7720660466 is a wasteful number, since it uses less digits than its factorization.

7720660466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551549.

The product of its (nonzero) digits is 508032, while the sum is 44.

The square root of 7720660466 is about 87867.2889419037. The cubic root of 7720660466 is about 1976.4453845940.

The spelling of 7720660466 in words is "seven billion, seven hundred twenty million, six hundred sixty thousand, four hundred sixty-six".