65278433 has 16 divisors (see below), whose sum is σ = 75229440. Its totient is φ = 56019600.

The previous prime is 65278427. The next prime is 65278459. The reversal of 65278433 is 33487256.

It is not a de Polignac number, because 65278433 - 2⁴ = 65278417 is a prime.

It is a super-2 number, since 2×65278433² = 8522547629870978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65278483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114038 + ... + 114608.

It is an arithmetic number, because the mean of its divisors is an integer number (4701840).

Almost surely, 2^65278433 is an apocalyptic number.

It is an amenable number.

65278433 is a deficient number, since it is larger than the sum of its proper divisors (9951007).

65278433 is a wasteful number, since it uses less digits than its factorization.

65278433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its digits is 120960, while the sum is 38.

The square root of 65278433 is about 8079.5069775327. The cubic root of 65278433 is about 402.6458620299.

The spelling of 65278433 in words is "sixty-five million, two hundred seventy-eight thousand, four hundred thirty-three".