65912889 has 12 divisors (see below), whose sum is σ = 102232464. Its totient is φ = 37664424.

The previous prime is 65912863. The next prime is 65912909. The reversal of 65912889 is 98821956.

It is a happy number.

It is not a de Polignac number, because 65912889 - 2⁵ = 65912857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65912809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224047 + ... + 224340.

It is an arithmetic number, because the mean of its divisors is an integer number (8519372).

Almost surely, 2^65912889 is an apocalyptic number.

It is an amenable number.

65912889 is a deficient number, since it is larger than the sum of its proper divisors (36319575).

65912889 is a wasteful number, since it uses less digits than its factorization.

65912889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448404 (or 448397 counting only the distinct ones).

The product of its digits is 311040, while the sum is 48.

The square root of 65912889 is about 8118.6753229822. The cubic root of 65912889 is about 403.9461275909.

The spelling of 65912889 in words is "sixty-five million, nine hundred twelve thousand, eight hundred eighty-nine".