67877862991 has 4 divisors (see below), whose sum is σ = 67879954800. Its totient is φ = 67875771184.

The previous prime is 67877862977. The next prime is 67877863019. The reversal of 67877862991 is 19926877876.

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 67877862991 - 2⁷ = 67877862863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67877862991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67877862901) 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, 996451 + ... + 1062388.

It is an arithmetic number, because the mean of its divisors is an integer number (16969988700).

Almost surely, 2^67877862991 is an apocalyptic number.

67877862991 is a deficient number, since it is larger than the sum of its proper divisors (2091809).

67877862991 is a wasteful number, since it uses less digits than its factorization.

67877862991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091808.

The product of its digits is 128024064, while the sum is 70.

The spelling of 67877862991 in words is "sixty-seven billion, eight hundred seventy-seven million, eight hundred sixty-two thousand, nine hundred ninety-one".