79776048666 has 16 divisors (see below), whose sum is σ = 159575360544. Its totient is φ = 26588139024.

The previous prime is 79776048661. The next prime is 79776048689. The reversal of 79776048666 is 66684067797.

It is a junction number, because it is equal to n+sod(n) for n = 79776048597 and 79776048606.

It is not an unprimeable number, because it can be changed into a prime (79776048661) 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, 924561 + ... + 1007156.

It is an arithmetic number, because the mean of its divisors is an integer number (9973460034).

Almost surely, 2^79776048666 is an apocalyptic number.

79776048666 is an abundant number, since it is smaller than the sum of its proper divisors (79799311878).

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

79776048666 is a wasteful number, since it uses less digits than its factorization.

79776048666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938605.

The product of its (nonzero) digits is 128024064, while the sum is 66.

The spelling of 79776048666 in words is "seventy-nine billion, seven hundred seventy-six million, forty-eight thousand, six hundred sixty-six".