65278814 has 4 divisors (see below), whose sum is σ = 97918224. Its totient is φ = 32639406.

The previous prime is 65278789. The next prime is 65278819. The reversal of 65278814 is 41887256.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×65278814² = 8522647114493192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65278819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16319702 + ... + 16319705.

It is an arithmetic number, because the mean of its divisors is an integer number (24479556).

Almost surely, 2^65278814 is an apocalyptic number.

65278814 is a deficient number, since it is larger than the sum of its proper divisors (32639410).

65278814 is a wasteful number, since it uses less digits than its factorization.

65278814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32639409.

The product of its digits is 107520, while the sum is 41.

The square root of 65278814 is about 8079.5305556697. The cubic root of 65278814 is about 402.6466453809.

The spelling of 65278814 in words is "sixty-five million, two hundred seventy-eight thousand, eight hundred fourteen".