66022665 has 16 divisors (see below), whose sum is σ = 105759168. Its totient is φ = 35171136.

The previous prime is 66022657. The next prime is 66022667. The reversal of 66022665 is 56622066.

It is not a de Polignac number, because 66022665 - 2³ = 66022657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66022667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14382 + ... + 18408.

It is an arithmetic number, because the mean of its divisors is an integer number (6609948).

Almost surely, 2^66022665 is an apocalyptic number.

It is an amenable number.

66022665 is a deficient number, since it is larger than the sum of its proper divisors (39736503).

66022665 is a wasteful number, since it uses less digits than its factorization.

66022665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 66022665 is about 8125.4332192198. The cubic root of 66022665 is about 404.1702567199.

The spelling of 66022665 in words is "sixty-six million, twenty-two thousand, six hundred sixty-five".