266661556163000 has 64 divisors (see below), whose sum is σ = 623995527748320. Its totient is φ = 106663342752000.

The previous prime is 266661556162931. The next prime is 266661556163011. The reversal of 266661556163000 is 361655166662.

It is a super-2 number, since 2×266661556163000² (a number of 30 digits) contains 22 as substring.

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, 84086180 + ... + 87199820.

Almost surely, 2^{266661556163000} is an apocalyptic number.

266661556163000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266661556163000 is an abundant number, since it is smaller than the sum of its proper divisors (357333971585320).

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

266661556163000 is a wasteful number, since it uses less digits than its factorization.

266661556163000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199305 (or 3199291 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 266661556163000 in words is "two hundred sixty-six trillion, six hundred sixty-one billion, five hundred fifty-six million, one hundred sixty-three thousand".