66240965 has 8 divisors (see below), whose sum is σ = 90844800. Its totient is φ = 45422352.

The previous prime is 66240929. The next prime is 66240971. The reversal of 66240965 is 56904266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66240965 - 2⁸ = 66240709 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 946265 + ... + 946334.

It is an arithmetic number, because the mean of its divisors is an integer number (11355600).

Almost surely, 2^66240965 is an apocalyptic number.

It is an amenable number.

66240965 is a deficient number, since it is larger than the sum of its proper divisors (24603835).

66240965 is a wasteful number, since it uses less digits than its factorization.

66240965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892611.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 66240965 is about 8138.8552634876. The cubic root of 66240965 is about 404.6152216041.

The spelling of 66240965 in words is "sixty-six million, two hundred forty thousand, nine hundred sixty-five".