65664235 has 32 divisors (see below), whose sum is σ = 97517952. Its totient is φ = 41333760.

The previous prime is 65664223. The next prime is 65664239. The reversal of 65664235 is 53246656.

It is not a de Polignac number, because 65664235 - 2²¹ = 63567083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65664194 and 65664203.

It is not an unprimeable number, because it can be changed into a prime (65664239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125775 + ... + 126295.

It is an arithmetic number, because the mean of its divisors is an integer number (3047436).

Almost surely, 2^65664235 is an apocalyptic number.

65664235 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

65664235 is a deficient number, since it is larger than the sum of its proper divisors (31853717).

65664235 is a wasteful number, since it uses less digits than its factorization.

65664235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823.

The product of its digits is 129600, while the sum is 37.

The square root of 65664235 is about 8103.3471479383. The cubic root of 65664235 is about 403.4375300922.

It can be divided in two parts, 6566 and 4235, that added together give a palindrome (10801).

The spelling of 65664235 in words is "sixty-five million, six hundred sixty-four thousand, two hundred thirty-five".