66022881 has 8 divisors (see below), whose sum is σ = 88190784. Its totient is φ = 43935120.

The previous prime is 66022877. The next prime is 66022889. The reversal of 66022881 is 18822066.

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

It is not a de Polignac number, because 66022881 - 2² = 66022877 is a prime.

It is a super-2 number, since 2×66022881² = 8718041631080322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66022889) 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, 18085 + ... + 21426.

It is an arithmetic number, because the mean of its divisors is an integer number (11023848).

Almost surely, 2^66022881 is an apocalyptic number.

It is an amenable number.

66022881 is a deficient number, since it is larger than the sum of its proper divisors (22167903).

66022881 is a wasteful number, since it uses less digits than its factorization.

66022881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40071.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 66022881 is about 8125.4465108079. The cubic root of 66022881 is about 404.1706974811.

The spelling of 66022881 in words is "sixty-six million, twenty-two thousand, eight hundred eighty-one".