66022973 has 2 divisors, whose sum is σ = 66022974. Its totient is φ = 66022972.

The previous prime is 66022969. The next prime is 66022981. The reversal of 66022973 is 37922066.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52678564 + 13344409 = 7258^2 + 3653^2 .

It is a cyclic number.

It is not a de Polignac number, because 66022973 - 2² = 66022969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66022273) by changing a digit.

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 as a sum of consecutive naturals, namely, 33011486 + 33011487.

It is an arithmetic number, because the mean of its divisors is an integer number (33011487).

Almost surely, 2^66022973 is an apocalyptic number.

It is an amenable number.

66022973 is a deficient number, since it is larger than the sum of its proper divisors (1).

66022973 is an equidigital number, since it uses as much as digits as its factorization.

66022973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 66022973 is about 8125.4521720333. The cubic root of 66022973 is about 404.1708852124.

The spelling of 66022973 in words is "sixty-six million, twenty-two thousand, nine hundred seventy-three".