65783957 has 2 divisors, whose sum is σ = 65783958. Its totient is φ = 65783956.

The previous prime is 65783941. The next prime is 65783983. The reversal of 65783957 is 75938756.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51351556 + 14432401 = 7166^2 + 3799^2 .

It is a cyclic number.

It is not a de Polignac number, because 65783957 - 2⁴ = 65783941 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 (65783917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32891978 + 32891979.

It is an arithmetic number, because the mean of its divisors is an integer number (32891979).

Almost surely, 2^65783957 is an apocalyptic number.

It is an amenable number.

65783957 is a deficient number, since it is larger than the sum of its proper divisors (1).

65783957 is an equidigital number, since it uses as much as digits as its factorization.

65783957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1587600, while the sum is 50.

The square root of 65783957 is about 8110.7309781548. The cubic root of 65783957 is about 403.6825697409.

The spelling of 65783957 in words is "sixty-five million, seven hundred eighty-three thousand, nine hundred fifty-seven".