65021886 has 32 divisors (see below), whose sum is σ = 149479200. Its totient is φ = 20926080.

The previous prime is 65021863. The next prime is 65021921. The reversal of 65021886 is 68812056.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 65021886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19195 + ... + 22326.

It is an arithmetic number, because the mean of its divisors is an integer number (4671225).

Almost surely, 2^65021886 is an apocalyptic number.

65021886 is an abundant number, since it is smaller than the sum of its proper divisors (84457314).

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

65021886 is a wasteful number, since it uses less digits than its factorization.

65021886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41561 (or 41555 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 65021886 is about 8063.6149461640. The cubic root of 65021886 is about 402.1176977714.

The spelling of 65021886 in words is "sixty-five million, twenty-one thousand, eight hundred eighty-six".