266554941980 has 24 divisors (see below), whose sum is σ = 561588731088. Its totient is φ = 106274671488.

The previous prime is 266554941907. The next prime is 266554942013. The reversal of 266554941980 is 89149455662.

It is a super-2 number, since 2×266554941980² (a number of 24 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 7 ways as a sum of consecutive naturals, for example, 21700289 + ... + 21712568.

It is an arithmetic number, because the mean of its divisors is an integer number (23399530462).

Almost surely, 2^266554941980 is an apocalyptic number.

266554941980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266554941980 is an abundant number, since it is smaller than the sum of its proper divisors (295033789108).

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

266554941980 is a wasteful number, since it uses less digits than its factorization.

266554941980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43413173 (or 43413171 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 59.

The spelling of 266554941980 in words is "two hundred sixty-six billion, five hundred fifty-four million, nine hundred forty-one thousand, nine hundred eighty".