266665669125 has 16 divisors (see below), whose sum is σ = 443731674048. Its totient is φ = 142221690000.

The previous prime is 266665669117. The next prime is 266665669183. The reversal of 266665669125 is 521966566662.

It is a happy number.

It is not a de Polignac number, because 266665669125 - 2³ = 266665669117 is a prime.

It is a super-2 number, since 2×266665669125² (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 15 ways as a sum of consecutive naturals, for example, 355553851 + ... + 355554600.

It is an arithmetic number, because the mean of its divisors is an integer number (27733229628).

Almost surely, 2^266665669125 is an apocalyptic number.

266665669125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266665669125 is a deficient number, since it is larger than the sum of its proper divisors (177066004923).

266665669125 is an equidigital number, since it uses as much as digits as its factorization.

266665669125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711108469 (or 711108459 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 60.

The spelling of 266665669125 in words is "two hundred sixty-six billion, six hundred sixty-five million, six hundred sixty-nine thousand, one hundred twenty-five".