398998764066 has 32 divisors (see below), whose sum is σ = 912566971008. Its totient is φ = 113928422400.

The previous prime is 398998764053. The next prime is 398998764067. The reversal of 398998764066 is 660467899893.

It is not an unprimeable number, because it can be changed into a prime (398998764067) 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, 2899645 + ... + 3034128.

It is an arithmetic number, because the mean of its divisors is an integer number (28517717844).

Almost surely, 2^398998764066 is an apocalyptic number.

398998764066 is an abundant number, since it is smaller than the sum of its proper divisors (513568206942).

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

398998764066 is a wasteful number, since it uses less digits than its factorization.

398998764066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5935386.

The product of its (nonzero) digits is 846526464, while the sum is 75.

The spelling of 398998764066 in words is "three hundred ninety-eight billion, nine hundred ninety-eight million, seven hundred sixty-four thousand, sixty-six".