66333965 has 4 divisors (see below), whose sum is σ = 79600764. Its totient is φ = 53067168.

The previous prime is 66333961. The next prime is 66333973. The reversal of 66333965 is 56933366.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39262756 + 27071209 = 6266^2 + 5203^2 .

It is a cyclic number.

It is not a de Polignac number, because 66333965 - 2² = 66333961 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66333961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6633392 + ... + 6633401.

It is an arithmetic number, because the mean of its divisors is an integer number (19900191).

Almost surely, 2^66333965 is an apocalyptic number.

It is an amenable number.

66333965 is a deficient number, since it is larger than the sum of its proper divisors (13266799).

66333965 is a wasteful number, since it uses less digits than its factorization.

66333965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13266798.

The product of its digits is 262440, while the sum is 41.

The square root of 66333965 is about 8144.5665937483. The cubic root of 66333965 is about 404.8044882676.

The spelling of 66333965 in words is "sixty-six million, three hundred thirty-three thousand, nine hundred sixty-five".