266621254101461 has 4 divisors (see below), whose sum is σ = 304710004687392. Its totient is φ = 228532503515532.

The previous prime is 266621254101451. The next prime is 266621254101563. The reversal of 266621254101461 is 164101452126662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 266621254101461 - 2¹⁰ = 266621254100437 is a prime.

It is a super-2 number, since 2×266621254101461² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266621254101421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19044375292955 + ... + 19044375292968.

It is an arithmetic number, because the mean of its divisors is an integer number (76177501171848).

Almost surely, 2^{266621254101461} is an apocalyptic number.

It is an amenable number.

266621254101461 is a deficient number, since it is larger than the sum of its proper divisors (38088750585931).

266621254101461 is an equidigital number, since it uses as much as digits as its factorization.

266621254101461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38088750585930.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 266621254101461 in words is "two hundred sixty-six trillion, six hundred twenty-one billion, two hundred fifty-four million, one hundred one thousand, four hundred sixty-one".