666050772 has 24 divisors (see below), whose sum is σ = 1607709600. Its totient is φ = 214361056.

The previous prime is 666050753. The next prime is 666050773. The reversal of 666050772 is 277050666.

It is a self number, because there is not a number n which added to its sum of digits gives 666050772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666050773) 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, 956622 + ... + 957317.

It is an arithmetic number, because the mean of its divisors is an integer number (66987900).

Almost surely, 2^666050772 is an apocalyptic number.

It is an amenable number.

666050772 is an abundant number, since it is smaller than the sum of its proper divisors (941658828).

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

666050772 is a wasteful number, since it uses less digits than its factorization.

666050772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913975 (or 1913973 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 666050772 is about 25807.9594699000. The cubic root of 666050772 is about 873.3113650762.

The spelling of 666050772 in words is "six hundred sixty-six million, fifty thousand, seven hundred seventy-two".