66232456973 has 2 divisors, whose sum is σ = 66232456974. Its totient is φ = 66232456972.

The previous prime is 66232456937. The next prime is 66232456981. The reversal of 66232456973 is 37965423266.

Together with previous prime (66232456937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34172480164 + 32059976809 = 184858^2 + 179053^2 .

It is a cyclic number.

It is not a de Polignac number, because 66232456973 - 2¹⁶ = 66232391437 is a prime.

It is a super-3 number, since 3×66232456973³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66232456373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33116228486 + 33116228487.

It is an arithmetic number, because the mean of its divisors is an integer number (33116228487).

Almost surely, 2^66232456973 is an apocalyptic number.

It is an amenable number.

66232456973 is a deficient number, since it is larger than the sum of its proper divisors (1).

66232456973 is an equidigital number, since it uses as much as digits as its factorization.

66232456973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 53.

The spelling of 66232456973 in words is "sixty-six billion, two hundred thirty-two million, four hundred fifty-six thousand, nine hundred seventy-three".