65853663 has 4 divisors (see below), whose sum is σ = 87804888. Its totient is φ = 43902440.

The previous prime is 65853659. The next prime is 65853727. The reversal of 65853663 is 36635856.

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

It is a cyclic number.

It is not a de Polignac number, because 65853663 - 2² = 65853659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65853643) 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, 10975608 + ... + 10975613.

It is an arithmetic number, because the mean of its divisors is an integer number (21951222).

Almost surely, 2^65853663 is an apocalyptic number.

65853663 is a deficient number, since it is larger than the sum of its proper divisors (21951225).

65853663 is a wasteful number, since it uses less digits than its factorization.

65853663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21951224.

The product of its digits is 388800, while the sum is 42.

The square root of 65853663 is about 8115.0269870161. The cubic root of 65853663 is about 403.8251027911.

The spelling of 65853663 in words is "sixty-five million, eight hundred fifty-three thousand, six hundred sixty-three".