67791864 has 64 divisors (see below), whose sum is σ = 195459840. Its totient is φ = 19192320.

The previous prime is 67791859. The next prime is 67791877. The reversal of 67791864 is 46819776.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17199 + ... + 20769.

It is an arithmetic number, because the mean of its divisors is an integer number (3054060).

Almost surely, 2^67791864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67791864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97729920).

67791864 is an abundant number, since it is smaller than the sum of its proper divisors (127667976).

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

67791864 is a wasteful number, since it uses less digits than its factorization.

67791864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3700 (or 3696 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 67791864 is about 8233.5814807409. The cubic root of 67791864 is about 407.7486437179.

The spelling of 67791864 in words is "sixty-seven million, seven hundred ninety-one thousand, eight hundred sixty-four".