1001266655 has 32 divisors (see below), whose sum is σ = 1282928640. Its totient is φ = 748051200.

The previous prime is 1001266597. The next prime is 1001266661. The reversal of 1001266655 is 5566621001.

It is not a de Polignac number, because 1001266655 - 2²⁸ = 732831199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3198779 + ... + 3199091.

It is an arithmetic number, because the mean of its divisors is an integer number (40091520).

Almost surely, 2^1001266655 is an apocalyptic number.

1001266655 is a deficient number, since it is larger than the sum of its proper divisors (281661985).

1001266655 is a wasteful number, since it uses less digits than its factorization.

1001266655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1001266655 is about 31642.7978377387. The cubic root of 1001266655 is about 1000.4220401904.

Adding to 1001266655 its reverse (5566621001), we get a palindrome (6567887656).

It can be divided in two parts, 10012 and 66655, that added together give a palindrome (76667).

The spelling of 1001266655 in words is "one billion, one million, two hundred sixty-six thousand, six hundred fifty-five".