65688742 has 8 divisors (see below), whose sum is σ = 112609296. Its totient is φ = 28152312.

The previous prime is 65688739. The next prime is 65688769. The reversal of 65688742 is 24788656.

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

It is a junction number, because it is equal to n+sod(n) for n = 65688692 and 65688701.

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, 2346013 + ... + 2346040.

It is an arithmetic number, because the mean of its divisors is an integer number (14076162).

Almost surely, 2^65688742 is an apocalyptic number.

65688742 is a deficient number, since it is larger than the sum of its proper divisors (46920554).

65688742 is a wasteful number, since it uses less digits than its factorization.

65688742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692062.

The product of its digits is 645120, while the sum is 46.

The square root of 65688742 is about 8104.8591597880. The cubic root of 65688742 is about 403.4877137465.

It can be divided in two parts, 65688 and 742, that added together give a triangular number (66430 = T₃₆₄).

The spelling of 65688742 in words is "sixty-five million, six hundred eighty-eight thousand, seven hundred forty-two".