66864622 has 16 divisors (see below), whose sum is σ = 110546352. Its totient is φ = 30078720.

The previous prime is 66864617. The next prime is 66864647. The reversal of 66864622 is 22646866.

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 7 ways as a sum of consecutive naturals, for example, 13533 + ... + 17800.

It is an arithmetic number, because the mean of its divisors is an integer number (6909147).

Almost surely, 2^66864622 is an apocalyptic number.

66864622 is a deficient number, since it is larger than the sum of its proper divisors (43681730).

66864622 is a wasteful number, since it uses less digits than its factorization.

66864622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31443.

The product of its digits is 165888, while the sum is 40.

The square root of 66864622 is about 8177.0790628439. The cubic root of 66864622 is about 405.8810712349.

The spelling of 66864622 in words is "sixty-six million, eight hundred sixty-four thousand, six hundred twenty-two".