66086251 has 12 divisors (see below), whose sum is σ = 83865240. Its totient is φ = 51495360.

The previous prime is 66086249. The next prime is 66086257. The reversal of 66086251 is 15268066.

It is not a de Polignac number, because 66086251 - 2¹ = 66086249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66086257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60766 + ... + 61843.

It is an arithmetic number, because the mean of its divisors is an integer number (6988770).

Almost surely, 2^66086251 is an apocalyptic number.

66086251 is a deficient number, since it is larger than the sum of its proper divisors (17778989).

66086251 is a wasteful number, since it uses less digits than its factorization.

66086251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122634 (or 122627 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 66086251 is about 8129.3450535698. The cubic root of 66086251 is about 404.2999663380.

The spelling of 66086251 in words is "sixty-six million, eighty-six thousand, two hundred fifty-one".