66233251 has 12 divisors (see below), whose sum is σ = 78313440. Its totient is φ = 55838160.

The previous prime is 66233239. The next prime is 66233311. The reversal of 66233251 is 15233266.

It is not a de Polignac number, because 66233251 - 2¹³ = 66225059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66233231) 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, 8091 + ... + 14068.

It is an arithmetic number, because the mean of its divisors is an integer number (6526120).

Almost surely, 2^66233251 is an apocalyptic number.

66233251 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

66233251 is a deficient number, since it is larger than the sum of its proper divisors (12080189).

66233251 is a wasteful number, since it uses less digits than its factorization.

66233251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22234 (or 22227 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

The square root of 66233251 is about 8138.3813501212. The cubic root of 66233251 is about 404.5995146923.

The spelling of 66233251 in words is "sixty-six million, two hundred thirty-three thousand, two hundred fifty-one".