65811768 has 32 divisors (see below), whose sum is σ = 179487360. Its totient is φ = 19942880.

The previous prime is 65811761. The next prime is 65811769. The reversal of 65811768 is 86711856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65811761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124380 + ... + 124907.

It is an arithmetic number, because the mean of its divisors is an integer number (5608980).

Almost surely, 2^65811768 is an apocalyptic number.

It is an amenable number.

65811768 is an abundant number, since it is smaller than the sum of its proper divisors (113675592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65811768 is a wasteful number, since it uses less digits than its factorization.

65811768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249307 (or 249303 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 65811768 is about 8112.4452540526. The cubic root of 65811768 is about 403.7394490305.

The spelling of 65811768 in words is "sixty-five million, eight hundred eleven thousand, seven hundred sixty-eight".