66310901 has 2 divisors, whose sum is σ = 66310902. Its totient is φ = 66310900.

The previous prime is 66310861. The next prime is 66310903. The reversal of 66310901 is 10901366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57304900 + 9006001 = 7570^2 + 3001^2 .

It is a cyclic number.

It is not a de Polignac number, because 66310901 - 2⁶ = 66310837 is a prime.

Together with 66310903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66310903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33155450 + 33155451.

It is an arithmetic number, because the mean of its divisors is an integer number (33155451).

Almost surely, 2^66310901 is an apocalyptic number.

It is an amenable number.

66310901 is a deficient number, since it is larger than the sum of its proper divisors (1).

66310901 is an equidigital number, since it uses as much as digits as its factorization.

66310901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 66310901 is about 8143.1505573703. The cubic root of 66310901 is about 404.7575666391.

The spelling of 66310901 in words is "sixty-six million, three hundred ten thousand, nine hundred one".