67664823 has 8 divisors (see below), whose sum is σ = 92658288. Its totient is φ = 43890624.

The previous prime is 67664813. The next prime is 67664851. The reversal of 67664823 is 32846676.

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

It is not a de Polignac number, because 67664823 - 2¹² = 67660727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67664803) 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, 304686 + ... + 304907.

It is an arithmetic number, because the mean of its divisors is an integer number (11582286).

Almost surely, 2^67664823 is an apocalyptic number.

67664823 is a deficient number, since it is larger than the sum of its proper divisors (24993465).

67664823 is a wasteful number, since it uses less digits than its factorization.

67664823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609633.

The product of its digits is 290304, while the sum is 42.

The square root of 67664823 is about 8225.8630550235. The cubic root of 67664823 is about 407.4937793723.

The spelling of 67664823 in words is "sixty-seven million, six hundred sixty-four thousand, eight hundred twenty-three".