66622650 has 24 divisors (see below), whose sum is σ = 165224544. Its totient is φ = 17766000.

The previous prime is 66622639. The next prime is 66622691. The reversal of 66622650 is 5622666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221926 + ... + 222225.

It is an arithmetic number, because the mean of its divisors is an integer number (6884356).

Almost surely, 2^66622650 is an apocalyptic number.

66622650 is an abundant number, since it is smaller than the sum of its proper divisors (98601894).

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

66622650 is a wasteful number, since it uses less digits than its factorization.

66622650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444166 (or 444161 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 66622650 is about 8162.2699048733. The cubic root of 66622650 is about 405.3908739716.

The spelling of 66622650 in words is "sixty-six million, six hundred twenty-two thousand, six hundred fifty".