66975622 has 8 divisors (see below), whose sum is σ = 114815376. Its totient is φ = 28703832.

The previous prime is 66975619. The next prime is 66975637. The reversal of 66975622 is 22657966.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 2391973 + ... + 2392000.

It is an arithmetic number, because the mean of its divisors is an integer number (14351922).

Almost surely, 2^66975622 is an apocalyptic number.

66975622 is a deficient number, since it is larger than the sum of its proper divisors (47839754).

66975622 is a wasteful number, since it uses less digits than its factorization.

66975622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4783982.

The product of its digits is 272160, while the sum is 43.

The square root of 66975622 is about 8183.8635130359. The cubic root of 66975622 is about 406.1055441587.

The spelling of 66975622 in words is "sixty-six million, nine hundred seventy-five thousand, six hundred twenty-two".