205366666980 has 24 divisors (see below), whose sum is σ = 575026667712. Its totient is φ = 54764444512.

The previous prime is 205366666979. The next prime is 205366666987. The reversal of 205366666980 is 89666663502.

It is a self number, because there is not a number n which added to its sum of digits gives 205366666980.

It is not an unprimeable number, because it can be changed into a prime (205366666987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1711388832 + ... + 1711388951.

It is an arithmetic number, because the mean of its divisors is an integer number (23959444488).

Almost surely, 2^205366666980 is an apocalyptic number.

205366666980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205366666980 is an abundant number, since it is smaller than the sum of its proper divisors (369660000732).

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

205366666980 is a wasteful number, since it uses less digits than its factorization.

205366666980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422777795 (or 3422777793 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 57.

The spelling of 205366666980 in words is "two hundred five billion, three hundred sixty-six million, six hundred sixty-six thousand, nine hundred eighty".