66430751 has 2 divisors, whose sum is σ = 66430752. Its totient is φ = 66430750.

The previous prime is 66430733. The next prime is 66430759. The reversal of 66430751 is 15703466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66430751 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 (66430759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33215375 + 33215376.

It is an arithmetic number, because the mean of its divisors is an integer number (33215376).

Almost surely, 2^66430751 is an apocalyptic number.

66430751 is a deficient number, since it is larger than the sum of its proper divisors (1).

66430751 is an equidigital number, since it uses as much as digits as its factorization.

66430751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 66430751 is about 8150.5061806001. The cubic root of 66430751 is about 405.0012721598.

The spelling of 66430751 in words is "sixty-six million, four hundred thirty thousand, seven hundred fifty-one".