66319093 has 2 divisors, whose sum is σ = 66319094. Its totient is φ = 66319092.

The previous prime is 66319081. The next prime is 66319109. The reversal of 66319093 is 39091366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61575409 + 4743684 = 7847^2 + 2178^2 .

It is a cyclic number.

It is not a de Polignac number, because 66319093 - 2¹³ = 66310901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66319003) 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, 33159546 + 33159547.

It is an arithmetic number, because the mean of its divisors is an integer number (33159547).

Almost surely, 2^66319093 is an apocalyptic number.

It is an amenable number.

66319093 is a deficient number, since it is larger than the sum of its proper divisors (1).

66319093 is an equidigital number, since it uses as much as digits as its factorization.

66319093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 66319093 is about 8143.6535412553. The cubic root of 66319093 is about 404.7742337702.

The spelling of 66319093 in words is "sixty-six million, three hundred nineteen thousand, ninety-three".