266161605623641 has 32 divisors (see below), whose sum is σ = 359817132810240. Its totient is φ = 190831586451264.

The previous prime is 266161605623609. The next prime is 266161605623647. The reversal of 266161605623641 is 146326506161662.

It is a cyclic number.

It is not a de Polignac number, because 266161605623641 - 2⁵ = 266161605623609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (266161605623647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3346473745 + ... + 3346553278.

It is an arithmetic number, because the mean of its divisors is an integer number (11244285400320).

Almost surely, 2^{266161605623641} is an apocalyptic number.

It is an amenable number.

266161605623641 is a deficient number, since it is larger than the sum of its proper divisors (93655527186599).

266161605623641 is a wasteful number, since it uses less digits than its factorization.

266161605623641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6693027085.

The product of its (nonzero) digits is 11197440, while the sum is 55.

The spelling of 266161605623641 in words is "two hundred sixty-six trillion, one hundred sixty-one billion, six hundred five million, six hundred twenty-three thousand, six hundred forty-one".