74991069966 has 16 divisors (see below), whose sum is σ = 150029535744. Its totient is φ = 24989124024.

The previous prime is 74991069949. The next prime is 74991069991. The reversal of 74991069966 is 66996019947.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 74991069897 and 74991069906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1954240 + ... + 1992243.

It is an arithmetic number, because the mean of its divisors is an integer number (9376845984).

Almost surely, 2^74991069966 is an apocalyptic number.

74991069966 is an abundant number, since it is smaller than the sum of its proper divisors (75038465778).

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

74991069966 is a wasteful number, since it uses less digits than its factorization.

74991069966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3949655.

The product of its (nonzero) digits is 39680928, while the sum is 66.

The spelling of 74991069966 in words is "seventy-four billion, nine hundred ninety-one million, sixty-nine thousand, nine hundred sixty-six".