1266430206958 has 32 divisors (see below), whose sum is σ = 2209898718720. Its totient is φ = 533054247840.

The previous prime is 1266430206901. The next prime is 1266430206983. The reversal of 1266430206958 is 8596020346621.

It is a super-2 number, since 2×1266430206958² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156868 + ... + 1599208.

It is an arithmetic number, because the mean of its divisors is an integer number (69059334960).

Almost surely, 2^{1266430206958} is an apocalyptic number.

1266430206958 is a deficient number, since it is larger than the sum of its proper divisors (943468511762).

1266430206958 is a wasteful number, since it uses less digits than its factorization.

1266430206958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443472.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 1266430206958 in words is "one trillion, two hundred sixty-six billion, four hundred thirty million, two hundred six thousand, nine hundred fifty-eight".