65687394 has 16 divisors (see below), whose sum is σ = 133038720. Its totient is φ = 21618480.

The previous prime is 65687381. The next prime is 65687443. The reversal of 65687394 is 49378656.

It is a super-2 number, since 2×65687394² = 8629667461022472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68817 + ... + 69764.

It is an arithmetic number, because the mean of its divisors is an integer number (8314920).

Almost surely, 2^65687394 is an apocalyptic number.

65687394 is an abundant number, since it is smaller than the sum of its proper divisors (67351326).

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

65687394 is a wasteful number, since it uses less digits than its factorization.

65687394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138665.

The product of its digits is 1088640, while the sum is 48.

The square root of 65687394 is about 8104.7759993722. The cubic root of 65687394 is about 403.4849537345.

The spelling of 65687394 in words is "sixty-five million, six hundred eighty-seven thousand, three hundred ninety-four".