66956622 has 32 divisors (see below), whose sum is σ = 138101760. Its totient is φ = 21631680.

The previous prime is 66956599. The next prime is 66956639. The reversal of 66956622 is 22665966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24547 + ... + 27137.

It is an arithmetic number, because the mean of its divisors is an integer number (4315680).

Almost surely, 2^66956622 is an apocalyptic number.

66956622 is an abundant number, since it is smaller than the sum of its proper divisors (71145138).

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

66956622 is a wasteful number, since it uses less digits than its factorization.

66956622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728.

The product of its digits is 233280, while the sum is 42.

The square root of 66956622 is about 8182.7026097739. The cubic root of 66956622 is about 406.0671384679.

It can be divided in two parts, 669 and 56622, that added together give a triangular number (57291 = T₃₃₈).

The spelling of 66956622 in words is "sixty-six million, nine hundred fifty-six thousand, six hundred twenty-two".