66376757 has 2 divisors, whose sum is σ = 66376758. Its totient is φ = 66376756.

The previous prime is 66376741. The next prime is 66376759. The reversal of 66376757 is 75767366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35117476 + 31259281 = 5926^2 + 5591^2 .

It is a cyclic number.

It is not a de Polignac number, because 66376757 - 2⁴ = 66376741 is a prime.

Together with 66376759, 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 (66376759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33188378 + 33188379.

It is an arithmetic number, because the mean of its divisors is an integer number (33188379).

Almost surely, 2^66376757 is an apocalyptic number.

It is an amenable number.

66376757 is a deficient number, since it is larger than the sum of its proper divisors (1).

66376757 is an equidigital number, since it uses as much as digits as its factorization.

66376757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1111320, while the sum is 47.

The square root of 66376757 is about 8147.1931976602. The cubic root of 66376757 is about 404.8915159319.

The spelling of 66376757 in words is "sixty-six million, three hundred seventy-six thousand, seven hundred fifty-seven".