66322081 has 8 divisors (see below), whose sum is σ = 75858624. Its totient is φ = 56801040.

The previous prime is 66322079. The next prime is 66322097. The reversal of 66322081 is 18022366.

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

It is a cyclic number.

It is not a de Polignac number, because 66322081 - 2¹ = 66322079 is a prime.

It is a super-2 number, since 2×66322081² = 8797236856341122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66322021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7551 + ... + 13771.

It is an arithmetic number, because the mean of its divisors is an integer number (9482328).

Almost surely, 2^66322081 is an apocalyptic number.

It is an amenable number.

66322081 is a deficient number, since it is larger than the sum of its proper divisors (9536543).

66322081 is a wasteful number, since it uses less digits than its factorization.

66322081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7751.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 66322081 is about 8143.8369949306. The cubic root of 66322081 is about 404.7803126996.

The spelling of 66322081 in words is "sixty-six million, three hundred twenty-two thousand, eighty-one".