67664274 has 8 divisors (see below), whose sum is σ = 135328560. Its totient is φ = 22554756.

The previous prime is 67664273. The next prime is 67664281. The reversal of 67664274 is 47246676.

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

67664274 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67664273) 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, 5638684 + ... + 5638695.

It is an arithmetic number, because the mean of its divisors is an integer number (16916070).

Almost surely, 2^67664274 is an apocalyptic number.

67664274 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67664274 is a wasteful number, since it uses less digits than its factorization.

67664274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11277384.

The product of its digits is 338688, while the sum is 42.

The square root of 67664274 is about 8225.8296845972. The cubic root of 67664274 is about 407.4926772995.

The spelling of 67664274 in words is "sixty-seven million, six hundred sixty-four thousand, two hundred seventy-four".