998101866 has 16 divisors (see below), whose sum is σ = 1996655904. Its totient is φ = 332625264.

The previous prime is 998101849. The next prime is 998101877. The reversal of 998101866 is 668101899.

998101866 is a strobogrammatic number because it is the same when read upside-down.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14356 + ... + 46928.

It is an arithmetic number, because the mean of its divisors is an integer number (124790994).

Almost surely, 2^998101866 is an apocalyptic number.

998101866 is an abundant number, since it is smaller than the sum of its proper divisors (998554038).

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

998101866 is a wasteful number, since it uses less digits than its factorization.

998101866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37685.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 998101866 is about 31592.7502126675. The cubic root of 998101866 is about 999.3668879204.

The spelling of 998101866 in words is "nine hundred ninety-eight million, one hundred one thousand, eight hundred sixty-six".