1266555551007 has 8 divisors (see below), whose sum is σ = 1688762203776. Its totient is φ = 844359632792.

The previous prime is 1266555550999. The next prime is 1266555551011. The reversal of 1266555551007 is 7001555556621.

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 1266555551007 - 2³ = 1266555550999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266555551017) 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, 2404173 + ... + 2883254.

It is an arithmetic number, because the mean of its divisors is an integer number (211095275472).

Almost surely, 2^{1266555551007} is an apocalyptic number.

1266555551007 is a deficient number, since it is larger than the sum of its proper divisors (422206652769).

1266555551007 is an equidigital number, since it uses as much as digits as its factorization.

1266555551007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5367277.

The product of its (nonzero) digits is 1575000, while the sum is 48.

The spelling of 1266555551007 in words is "one trillion, two hundred sixty-six billion, five hundred fifty-five million, five hundred fifty-one thousand, seven".