1266456745478 has 8 divisors (see below), whose sum is σ = 1899817074840. Its totient is φ = 633184387200.

The previous prime is 1266456745427. The next prime is 1266456745481. The reversal of 1266456745478 is 8745476546621.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21956768 + ... + 22014371.

It is an arithmetic number, because the mean of its divisors is an integer number (237477134355).

Almost surely, 2^{1266456745478} is an apocalyptic number.

1266456745478 is a deficient number, since it is larger than the sum of its proper divisors (633360329362).

1266456745478 is a wasteful number, since it uses less digits than its factorization.

1266456745478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43985542.

The product of its digits is 270950400, while the sum is 65.

The spelling of 1266456745478 in words is "one trillion, two hundred sixty-six billion, four hundred fifty-six million, seven hundred forty-five thousand, four hundred seventy-eight".