67664369 has 8 divisors (see below), whose sum is σ = 72552960. Its totient is φ = 62876736.

The previous prime is 67664353. The next prime is 67664381. The reversal of 67664369 is 96346676.

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 67664369 - 2⁴ = 67664353 is a prime.

It is a super-2 number, since 2×67664369² = 9156933664336322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67664269) 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, 23849 + ... + 26534.

It is an arithmetic number, because the mean of its divisors is an integer number (9069120).

Almost surely, 2^67664369 is an apocalyptic number.

It is an amenable number.

67664369 is a deficient number, since it is larger than the sum of its proper divisors (4888591).

67664369 is a wasteful number, since it uses less digits than its factorization.

67664369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50479.

The product of its digits is 979776, while the sum is 47.

The square root of 67664369 is about 8225.8354590886. The cubic root of 67664369 is about 407.4928680047.

The spelling of 67664369 in words is "sixty-seven million, six hundred sixty-four thousand, three hundred sixty-nine".