65751979 has 2 divisors, whose sum is σ = 65751980. Its totient is φ = 65751978.

The previous prime is 65751967. The next prime is 65752021. The reversal of 65751979 is 97915756.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65751979 - 2⁵ = 65751947 is a prime.

It is not a weakly prime, because it can be changed into another prime (65751929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32875989 + 32875990.

It is an arithmetic number, because the mean of its divisors is an integer number (32875990).

Almost surely, 2^65751979 is an apocalyptic number.

65751979 is a deficient number, since it is larger than the sum of its proper divisors (1).

65751979 is an equidigital number, since it uses as much as digits as its factorization.

65751979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 595350, while the sum is 49.

The square root of 65751979 is about 8108.7593995629. The cubic root of 65751979 is about 403.6171482507.

The spelling of 65751979 in words is "sixty-five million, seven hundred fifty-one thousand, nine hundred seventy-nine".