1266912420479 has 8 divisors (see below), whose sum is σ = 1270934926272. Its totient is φ = 1262896266240.

The previous prime is 1266912420457. The next prime is 1266912420497. The reversal of 1266912420479 is 9740242196621.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1266912420479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1266912420479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266912420439) 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, 1188167 + ... + 1986344.

It is an arithmetic number, because the mean of its divisors is an integer number (158866865784).

Almost surely, 2^{1266912420479} is an apocalyptic number.

1266912420479 is a deficient number, since it is larger than the sum of its proper divisors (4022505793).

1266912420479 is an equidigital number, since it uses as much as digits as its factorization.

1266912420479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175777.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 1266912420479 in words is "one trillion, two hundred sixty-six billion, nine hundred twelve million, four hundred twenty thousand, four hundred seventy-nine".