266621400361052 has 18 divisors (see below), whose sum is σ = 512860586232624. Its totient is φ = 121191545618440.

The previous prime is 266621400361051. The next prime is 266621400361157. The reversal of 266621400361052 is 250163004126662.

It is a happy number.

It is a super-2 number, since 2×266621400361052² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 266621400360994 and 266621400361012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266621400361051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 275435330468 + ... + 275435331435.

Almost surely, 2^{266621400361052} is an apocalyptic number.

266621400361052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

266621400361052 is a deficient number, since it is larger than the sum of its proper divisors (246239185871572).

266621400361052 is a wasteful number, since it uses less digits than its factorization.

266621400361052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550870661929 (or 550870661916 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 266621400361052 in words is "two hundred sixty-six trillion, six hundred twenty-one billion, four hundred million, three hundred sixty-one thousand, fifty-two".