1266981626 has 8 divisors (see below), whose sum is σ = 1901427264. Its totient is φ = 633172540.

The previous prime is 1266981613. The next prime is 1266981629. The reversal of 1266981626 is 6261896621.

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

It is not an unprimeable number, because it can be changed into a prime (1266981629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154130 + ... + 162141.

It is an arithmetic number, because the mean of its divisors is an integer number (237678408).

Almost surely, 2^1266981626 is an apocalyptic number.

1266981626 is a deficient number, since it is larger than the sum of its proper divisors (634445638).

1266981626 is a wasteful number, since it uses less digits than its factorization.

1266981626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318276.

The product of its digits is 373248, while the sum is 47.

The square root of 1266981626 is about 35594.6853617222. The cubic root of 1266981626 is about 1082.0735272791.

The spelling of 1266981626 in words is "one billion, two hundred sixty-six million, nine hundred eighty-one thousand, six hundred twenty-six".