66330157 has 2 divisors, whose sum is σ = 66330158. Its totient is φ = 66330156.

The previous prime is 66330139. The next prime is 66330161. The reversal of 66330157 is 75103366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38303721 + 28026436 = 6189^2 + 5294^2 .

It is a cyclic number.

It is not a de Polignac number, because 66330157 - 2¹⁵ = 66297389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66330167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33165078 + 33165079.

It is an arithmetic number, because the mean of its divisors is an integer number (33165079).

Almost surely, 2^66330157 is an apocalyptic number.

It is an amenable number.

66330157 is a deficient number, since it is larger than the sum of its proper divisors (1).

66330157 is an equidigital number, since it uses as much as digits as its factorization.

66330157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 66330157 is about 8144.3328149088. The cubic root of 66330157 is about 404.7967419847.

The spelling of 66330157 in words is "sixty-six million, three hundred thirty thousand, one hundred fifty-seven".