666772676 has 24 divisors (see below), whose sum is σ = 1209944064. Its totient is φ = 321171840.

The previous prime is 666772651. The next prime is 666772697. The reversal of 666772676 is 676277666.

It is a happy number.

666772676 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 15596 + ... + 39708.

It is an arithmetic number, because the mean of its divisors is an integer number (50414336).

Almost surely, 2^666772676 is an apocalyptic number.

It is an amenable number.

666772676 is a deficient number, since it is larger than the sum of its proper divisors (543171388).

666772676 is a wasteful number, since it uses less digits than its factorization.

666772676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24371 (or 24369 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 53.

The square root of 666772676 is about 25821.9417550269. The cubic root of 666772676 is about 873.6267661235.

The spelling of 666772676 in words is "six hundred sixty-six million, seven hundred seventy-two thousand, six hundred seventy-six".