77667161879 has 4 divisors (see below), whose sum is σ = 77755320720. Its totient is φ = 77579003040.

The previous prime is 77667161867. The next prime is 77667161893. The reversal of 77667161879 is 97816176677.

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 77667161879 - 2⁴ = 77667161863 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 (77667161899) 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, 44078099 + ... + 44079860.

It is an arithmetic number, because the mean of its divisors is an integer number (19438830180).

Almost surely, 2^77667161879 is an apocalyptic number.

77667161879 is a deficient number, since it is larger than the sum of its proper divisors (88158841).

77667161879 is an equidigital number, since it uses as much as digits as its factorization.

77667161879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88158840.

The product of its digits is 37340352, while the sum is 65.

The spelling of 77667161879 in words is "seventy-seven billion, six hundred sixty-seven million, one hundred sixty-one thousand, eight hundred seventy-nine".