66122973 has 24 divisors (see below), whose sum is σ = 113201088. Its totient is φ = 37783584.

The previous prime is 66122951. The next prime is 66122977. The reversal of 66122973 is 37922166.

It is not a de Polignac number, because 66122973 - 2⁶ = 66122909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66122977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17736 + ... + 21137.

It is an arithmetic number, because the mean of its divisors is an integer number (4716712).

Almost surely, 2^66122973 is an apocalyptic number.

66122973 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

66122973 is a deficient number, since it is larger than the sum of its proper divisors (47078115).

66122973 is an equidigital number, since it uses as much as digits as its factorization.

66122973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38895 (or 38883 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 66122973 is about 8131.6033474340. The cubic root of 66122973 is about 404.3748379593.

The spelling of 66122973 in words is "sixty-six million, one hundred twenty-two thousand, nine hundred seventy-three".