66772093 has 2 divisors, whose sum is σ = 66772094. Its totient is φ = 66772092.

The previous prime is 66772051. The next prime is 66772117. The reversal of 66772093 is 39027766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43520409 + 23251684 = 6597^2 + 4822^2 .

It is a cyclic number.

It is not a de Polignac number, because 66772093 - 2¹³ = 66763901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66772033) 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, 33386046 + 33386047.

It is an arithmetic number, because the mean of its divisors is an integer number (33386047).

Almost surely, 2^66772093 is an apocalyptic number.

It is an amenable number.

66772093 is a deficient number, since it is larger than the sum of its proper divisors (1).

66772093 is an equidigital number, since it uses as much as digits as its factorization.

66772093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 40.

The square root of 66772093 is about 8171.4192769677. The cubic root of 66772093 is about 405.6937618856.

The spelling of 66772093 in words is "sixty-six million, seven hundred seventy-two thousand, ninety-three".