65811142 has 8 divisors (see below), whose sum is σ = 103008816. Its totient is φ = 31474872.

The previous prime is 65811127. The next prime is 65811167. The reversal of 65811142 is 24111856.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×65811142² = 8662212822688328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65811142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715293 + ... + 715384.

It is an arithmetic number, because the mean of its divisors is an integer number (12876102).

Almost surely, 2^65811142 is an apocalyptic number.

65811142 is a deficient number, since it is larger than the sum of its proper divisors (37197674).

65811142 is a wasteful number, since it uses less digits than its factorization.

65811142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430702.

The product of its digits is 1920, while the sum is 28.

The square root of 65811142 is about 8112.4066712659. The cubic root of 65811142 is about 403.7381689064.

Adding to 65811142 its reverse (24111856), we get a palindrome (89922998).

The spelling of 65811142 in words is "sixty-five million, eight hundred eleven thousand, one hundred forty-two".