84177666677 has 4 divisors (see below), whose sum is σ = 90652871820. Its totient is φ = 77702461536.

The previous prime is 84177666659. The next prime is 84177666691. The reversal of 84177666677 is 77666677148.

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

It can be written as a sum of positive squares in 2 ways, for example, as 53932630756 + 30245035921 = 232234^2 + 173911^2 .

It is a cyclic number.

It is not a de Polignac number, because 84177666677 - 2¹⁶ = 84177601141 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 (84177666607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3237602552 + ... + 3237602577.

It is an arithmetic number, because the mean of its divisors is an integer number (22663217955).

Almost surely, 2^84177666677 is an apocalyptic number.

It is an amenable number.

84177666677 is a deficient number, since it is larger than the sum of its proper divisors (6475205143).

84177666677 is a wasteful number, since it uses less digits than its factorization.

84177666677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6475205142.

The product of its digits is 99574272, while the sum is 65.

The spelling of 84177666677 in words is "eighty-four billion, one hundred seventy-seven million, six hundred sixty-six thousand, six hundred seventy-seven".