7961583666 has 16 divisors (see below), whose sum is σ = 15945890688. Its totient is φ = 2650074000.

The previous prime is 7961583631. The next prime is 7961583677. The reversal of 7961583666 is 6663851697.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 942250 + ... + 950661.

It is an arithmetic number, because the mean of its divisors is an integer number (996618168).

Almost surely, 2^7961583666 is an apocalyptic number.

7961583666 is an abundant number, since it is smaller than the sum of its proper divisors (7984307022).

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

7961583666 is a wasteful number, since it uses less digits than its factorization.

7961583666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893617.

The product of its digits is 9797760, while the sum is 57.

The square root of 7961583666 is about 89227.7068292131. The cubic root of 7961583666 is about 1996.7935007620.

The spelling of 7961583666 in words is "seven billion, nine hundred sixty-one million, five hundred eighty-three thousand, six hundred sixty-six".