265140126636666 has 16 divisors (see below), whose sum is σ = 530390338498944. Its totient is φ = 88361694674624.

The previous prime is 265140126636661. The next prime is 265140126636709. The reversal of 265140126636666 is 666636621041562.

265140126636666 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (265140126636661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4586853090 + ... + 4586910893.

It is an arithmetic number, because the mean of its divisors is an integer number (33149396156184).

Almost surely, 2^{265140126636666} is an apocalyptic number.

265140126636666 is an abundant number, since it is smaller than the sum of its proper divisors (265250211862278).

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

265140126636666 is a wasteful number, since it uses less digits than its factorization.

265140126636666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9173768805.

The product of its (nonzero) digits is 67184640, while the sum is 60.

The spelling of 265140126636666 in words is "two hundred sixty-five trillion, one hundred forty billion, one hundred twenty-six million, six hundred thirty-six thousand, six hundred sixty-six".