67214308891 has 4 divisors (see below), whose sum is σ = 69030911872. Its totient is φ = 65397705912.

The previous prime is 67214308883. The next prime is 67214308921. The reversal of 67214308891 is 19880341276.

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

It is a cyclic number.

It is not a de Polignac number, because 67214308891 - 2³ = 67214308883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67214308801) 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, 908301435 + ... + 908301508.

It is an arithmetic number, because the mean of its divisors is an integer number (17257727968).

Almost surely, 2^67214308891 is an apocalyptic number.

67214308891 is a deficient number, since it is larger than the sum of its proper divisors (1816602981).

67214308891 is a wasteful number, since it uses less digits than its factorization.

67214308891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816602980.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 67214308891 in words is "sixty-seven billion, two hundred fourteen million, three hundred eight thousand, eight hundred ninety-one".