66711950 has 12 divisors (see below), whose sum is σ = 124084320. Its totient is φ = 26684760.

The previous prime is 66711943. The next prime is 66711973. The reversal of 66711950 is 5911766.

It is a self number, because there is not a number n which added to its sum of digits gives 66711950.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667070 + ... + 667169.

It is an arithmetic number, because the mean of its divisors is an integer number (10340360).

Almost surely, 2^66711950 is an apocalyptic number.

66711950 is a deficient number, since it is larger than the sum of its proper divisors (57372370).

66711950 is a wasteful number, since it uses less digits than its factorization.

66711950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334251 (or 1334246 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 66711950 is about 8167.7383650555. The cubic root of 66711950 is about 405.5719197195.

The spelling of 66711950 in words is "sixty-six million, seven hundred eleven thousand, nine hundred fifty".