84661965777 has 16 divisors (see below), whose sum is σ = 113223518208. Its totient is φ = 56270983680.

The previous prime is 84661965757. The next prime is 84661965779. The reversal of 84661965777 is 77756916648.

It is not a de Polignac number, because 84661965777 - 2¹⁹ = 84661441489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84661965779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3080577 + ... + 3107937.

It is an arithmetic number, because the mean of its divisors is an integer number (7076469888).

Almost surely, 2^84661965777 is an apocalyptic number.

It is an amenable number.

84661965777 is a deficient number, since it is larger than the sum of its proper divisors (28561552431).

84661965777 is a wasteful number, since it uses less digits than its factorization.

84661965777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30440.

The product of its digits is 106686720, while the sum is 66.

The spelling of 84661965777 in words is "eighty-four billion, six hundred sixty-one million, nine hundred sixty-five thousand, seven hundred seventy-seven".