66051751 has 2 divisors, whose sum is σ = 66051752. Its totient is φ = 66051750.

The previous prime is 66051721. The next prime is 66051761. The reversal of 66051751 is 15715066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66051751 - 2⁵ = 66051719 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66051721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33025875 + 33025876.

It is an arithmetic number, because the mean of its divisors is an integer number (33025876).

Almost surely, 2^66051751 is an apocalyptic number.

66051751 is a deficient number, since it is larger than the sum of its proper divisors (1).

66051751 is an equidigital number, since it uses as much as digits as its factorization.

66051751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 66051751 is about 8127.2228344004. Note that the first 3 decimals coincide. The cubic root of 66051751 is about 404.2295998268.

The spelling of 66051751 in words is "sixty-six million, fifty-one thousand, seven hundred fifty-one".