67806791 has 4 divisors (see below), whose sum is σ = 73022712. Its totient is φ = 62590872.

The previous prime is 67806757. The next prime is 67806797. The reversal of 67806791 is 19760876.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67806791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67806797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2607941 + ... + 2607966.

It is an arithmetic number, because the mean of its divisors is an integer number (18255678).

Almost surely, 2^67806791 is an apocalyptic number.

67806791 is a deficient number, since it is larger than the sum of its proper divisors (5215921).

67806791 is a wasteful number, since it uses less digits than its factorization.

67806791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5215920.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 67806791 is about 8234.4879015030. The cubic root of 67806791 is about 407.7785687314.

The spelling of 67806791 in words is "sixty-seven million, eight hundred six thousand, seven hundred ninety-one".