65878061751 has 32 divisors (see below), whose sum is σ = 104880545280. Its totient is φ = 40718291328.

The previous prime is 65878061747. The next prime is 65878061759. The reversal of 65878061751 is 15716087856.

65878061751 is a `hidden beast` number, since 6 + 587 + 8 + 0 + 6 + 1 + 7 + 51 = 666.

It is not a de Polignac number, because 65878061751 - 2² = 65878061747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65878061759) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1040331 + ... + 1101836.

It is an arithmetic number, because the mean of its divisors is an integer number (3277517040).

Almost surely, 2^65878061751 is an apocalyptic number.

65878061751 is a deficient number, since it is larger than the sum of its proper divisors (39002483529).

65878061751 is a wasteful number, since it uses less digits than its factorization.

65878061751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142260 (or 2142254 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 65878061751 in words is "sixty-five billion, eight hundred seventy-eight million, sixty-one thousand, seven hundred fifty-one".