77334880661987 has 4 divisors (see below), whose sum is σ = 83283717636000. Its totient is φ = 71386043687976.

The previous prime is 77334880661981. The next prime is 77334880662001. The reversal of 77334880661987 is 78916608843377.

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 77334880661987 - 2¹⁰ = 77334880660963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77334880661981) 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, 2974418486987 + ... + 2974418487012.

It is an arithmetic number, because the mean of its divisors is an integer number (20820929409000).

Almost surely, 2^{77334880661987} is an apocalyptic number.

77334880661987 is a deficient number, since it is larger than the sum of its proper divisors (5948836974013).

77334880661987 is a wasteful number, since it uses less digits than its factorization.

77334880661987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5948836974012.

The product of its (nonzero) digits is 2048385024, while the sum is 77.

The spelling of 77334880661987 in words is "seventy-seven trillion, three hundred thirty-four billion, eight hundred eighty million, six hundred sixty-one thousand, nine hundred eighty-seven".