98777777766 has 8 divisors (see below), whose sum is σ = 197555555544. Its totient is φ = 32925925920.

The previous prime is 98777777729. The next prime is 98777777767. The reversal of 98777777766 is 66777777789.

It is a sphenic number, since it is the product of 3 distinct primes.

98777777766 is an admirable number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 98777777691 and 98777777700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98777777767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8231481475 + ... + 8231481486.

It is an arithmetic number, because the mean of its divisors is an integer number (24694444443).

Almost surely, 2^98777777766 is an apocalyptic number.

98777777766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

98777777766 is a wasteful number, since it uses less digits than its factorization.

98777777766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16462962966.

The product of its digits is 2134623456, while the sum is 78.

The spelling of 98777777766 in words is "ninety-eight billion, seven hundred seventy-seven million, seven hundred seventy-seven thousand, seven hundred sixty-six".