65678223 has 16 divisors (see below), whose sum is σ = 96316416. Its totient is φ = 39556320.

The previous prime is 65678189. The next prime is 65678227. The reversal of 65678223 is 32287656.

It is not a de Polignac number, because 65678223 - 2²⁴ = 48901007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65678227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16083 + ... + 19748.

It is an arithmetic number, because the mean of its divisors is an integer number (6019776).

Almost surely, 2^65678223 is an apocalyptic number.

65678223 is a deficient number, since it is larger than the sum of its proper divisors (30638193).

65678223 is a wasteful number, since it uses less digits than its factorization.

65678223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35894.

The product of its digits is 120960, while the sum is 39.

The square root of 65678223 is about 8104.2102021110. The cubic root of 65678223 is about 403.4661752317.

The spelling of 65678223 in words is "sixty-five million, six hundred seventy-eight thousand, two hundred twenty-three".