66060791 has 2 divisors, whose sum is σ = 66060792. Its totient is φ = 66060790.

The previous prime is 66060763. The next prime is 66060809. The reversal of 66060791 is 19706066.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66060791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66060391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33030395 + 33030396.

It is an arithmetic number, because the mean of its divisors is an integer number (33030396).

Almost surely, 2^66060791 is an apocalyptic number.

66060791 is a deficient number, since it is larger than the sum of its proper divisors (1).

66060791 is an equidigital number, since it uses as much as digits as its factorization.

66060791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 66060791 is about 8127.7789709120. The cubic root of 66060791 is about 404.2480402609.

The spelling of 66060791 in words is "sixty-six million, sixty thousand, seven hundred ninety-one".