1266651011 has 8 divisors (see below), whose sum is σ = 1341925344. Its totient is φ = 1191461760.

The previous prime is 1266650989. The next prime is 1266651047. The reversal of 1266651011 is 1101566621.

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 1266651011 - 2⁶ = 1266650947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266651311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10781 + ... + 51473.

It is an arithmetic number, because the mean of its divisors is an integer number (167740668).

Almost surely, 2^1266651011 is an apocalyptic number.

1266651011 is a deficient number, since it is larger than the sum of its proper divisors (75274333).

1266651011 is a wasteful number, since it uses less digits than its factorization.

1266651011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42541.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1266651011 is about 35590.0408962957. The cubic root of 1266651011 is about 1081.9793978263.

The spelling of 1266651011 in words is "one billion, two hundred sixty-six million, six hundred fifty-one thousand, eleven".