65768737 has 4 divisors (see below), whose sum is σ = 66044160. Its totient is φ = 65493316.

The previous prime is 65768711. The next prime is 65768779. The reversal of 65768737 is 73786756.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65768737 - 2⁷ = 65768609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65768537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137353 + ... + 137830.

It is an arithmetic number, because the mean of its divisors is an integer number (16511040).

Almost surely, 2^65768737 is an apocalyptic number.

It is an amenable number.

65768737 is a deficient number, since it is larger than the sum of its proper divisors (275423).

65768737 is a wasteful number, since it uses less digits than its factorization.

65768737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275422.

The product of its digits is 1481760, while the sum is 49.

The square root of 65768737 is about 8109.7926607281. The cubic root of 65768737 is about 403.6514348822.

The spelling of 65768737 in words is "sixty-five million, seven hundred sixty-eight thousand, seven hundred thirty-seven".