65575921 has 8 divisors (see below), whose sum is σ = 68526144. Its totient is φ = 62634000.

The previous prime is 65575907. The next prime is 65575949. The reversal of 65575921 is 12957556.

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 65575921 - 2¹³ = 65567729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65575901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18546 + ... + 21796.

It is an arithmetic number, because the mean of its divisors is an integer number (8565768).

Almost surely, 2^65575921 is an apocalyptic number.

It is an amenable number.

65575921 is a deficient number, since it is larger than the sum of its proper divisors (2950223).

65575921 is a wasteful number, since it uses less digits than its factorization.

65575921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4151.

The product of its digits is 94500, while the sum is 40.

The square root of 65575921 is about 8097.8960847865. The cubic root of 65575921 is about 403.2565834580.

The spelling of 65575921 in words is "sixty-five million, five hundred seventy-five thousand, nine hundred twenty-one".