66373157 has 2 divisors, whose sum is σ = 66373158. Its totient is φ = 66373156.

The previous prime is 66373129. The next prime is 66373183. The reversal of 66373157 is 75137366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56942116 + 9431041 = 7546^2 + 3071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66373157 is a prime.

It is a Chen prime.

It is equal to p_3916964 and since 66373157 and 3916964 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66373157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66373127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33186578 + 33186579.

It is an arithmetic number, because the mean of its divisors is an integer number (33186579).

Almost surely, 2^66373157 is an apocalyptic number.

It is an amenable number.

66373157 is a deficient number, since it is larger than the sum of its proper divisors (1).

66373157 is an equidigital number, since it uses as much as digits as its factorization.

66373157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 38.

The square root of 66373157 is about 8146.9722596803. The cubic root of 66373157 is about 404.8841959207.

The spelling of 66373157 in words is "sixty-six million, three hundred seventy-three thousand, one hundred fifty-seven".