66151237 has 2 divisors, whose sum is σ = 66151238. Its totient is φ = 66151236.

The previous prime is 66151229. The next prime is 66151259. The reversal of 66151237 is 73215166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65512836 + 638401 = 8094^2 + 799^2 .

It is a cyclic number.

It is not a de Polignac number, because 66151237 - 2³ = 66151229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66151199 and 66151208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66151037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33075618 + 33075619.

It is an arithmetic number, because the mean of its divisors is an integer number (33075619).

Almost surely, 2^66151237 is an apocalyptic number.

It is an amenable number.

66151237 is a deficient number, since it is larger than the sum of its proper divisors (1).

66151237 is an equidigital number, since it uses as much as digits as its factorization.

66151237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 31.

The square root of 66151237 is about 8133.3410724007. The cubic root of 66151237 is about 404.4324458870.

The spelling of 66151237 in words is "sixty-six million, one hundred fifty-one thousand, two hundred thirty-seven".