1266065310621 has 8 divisors (see below), whose sum is σ = 1695523588704. Its totient is φ = 840325286480.

The previous prime is 1266065310613. The next prime is 1266065310677. The reversal of 1266065310621 is 1260135606621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266065310621 - 2³ = 1266065310613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1266065310621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266065310421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 929562690 + ... + 929564051.

It is an arithmetic number, because the mean of its divisors is an integer number (211940448588).

Almost surely, 2^{1266065310621} is an apocalyptic number.

It is an amenable number.

1266065310621 is a deficient number, since it is larger than the sum of its proper divisors (429458278083).

1266065310621 is a wasteful number, since it uses less digits than its factorization.

1266065310621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859126971.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 1266065310621 in words is "one trillion, two hundred sixty-six billion, sixty-five million, three hundred ten thousand, six hundred twenty-one".