65891738 has 16 divisors (see below), whose sum is σ = 110331936. Its totient is φ = 29253840.

The previous prime is 65891659. The next prime is 65891789. The reversal of 65891738 is 83719856.

It is a happy number.

It is a super-2 number, since 2×65891738² = 8683442273321288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65891692 and 65891701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33881 + ... + 35772.

It is an arithmetic number, because the mean of its divisors is an integer number (6895746).

Almost surely, 2^65891738 is an apocalyptic number.

65891738 is a deficient number, since it is larger than the sum of its proper divisors (44440198).

65891738 is a wasteful number, since it uses less digits than its factorization.

65891738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69709.

The product of its digits is 362880, while the sum is 47.

The square root of 65891738 is about 8117.3726044823. The cubic root of 65891738 is about 403.9029151089.

The spelling of 65891738 in words is "sixty-five million, eight hundred ninety-one thousand, seven hundred thirty-eight".