99888061678 has 32 divisors (see below), whose sum is σ = 164485168128. Its totient is φ = 45289315200.

The previous prime is 99888061621. The next prime is 99888061687. The reversal of 99888061678 is 87616088899.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30513 + ... + 448003.

It is an arithmetic number, because the mean of its divisors is an integer number (5140161504).

Almost surely, 2^99888061678 is an apocalyptic number.

99888061678 is a deficient number, since it is larger than the sum of its proper divisors (64597106450).

99888061678 is a wasteful number, since it uses less digits than its factorization.

99888061678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417768.

The product of its (nonzero) digits is 83607552, while the sum is 70.

The spelling of 99888061678 in words is "ninety-nine billion, eight hundred eighty-eight million, sixty-one thousand, six hundred seventy-eight".