65687694 has 32 divisors (see below), whose sum is σ = 140797440. Its totient is φ = 20356992.

The previous prime is 65687689. The next prime is 65687737. The reversal of 65687694 is 49678656.

65687694 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4587 + ... + 12345.

It is an arithmetic number, because the mean of its divisors is an integer number (4399920).

Almost surely, 2^65687694 is an apocalyptic number.

65687694 is an abundant number, since it is smaller than the sum of its proper divisors (75109746).

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

65687694 is a wasteful number, since it uses less digits than its factorization.

With its successor (65687695) it forms an eRAP, since the sums of their prime factors are consecutive (7864 and 7865).

65687694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7864.

The product of its digits is 2177280, while the sum is 51.

The square root of 65687694 is about 8104.7945069570. The cubic root of 65687694 is about 403.4855679837.

The spelling of 65687694 in words is "sixty-five million, six hundred eighty-seven thousand, six hundred ninety-four".