11667023261 has 8 divisors (see below), whose sum is σ = 12116984760. Its totient is φ = 11224147968.

The previous prime is 11667023257. The next prime is 11667023353. The reversal of 11667023261 is 16232076611.

It can be written as a sum of positive squares in 4 ways, for example, as 2122905625 + 9544117636 = 46075^2 + 97694^2 .

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 11667023261 - 2² = 11667023257 is a prime.

It is a super-2 number, since 2×11667023261² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11667023201) 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, 1768196 + ... + 1774781.

It is an arithmetic number, because the mean of its divisors is an integer number (1514623095).

Almost surely, 2^11667023261 is an apocalyptic number.

It is an amenable number.

11667023261 is a deficient number, since it is larger than the sum of its proper divisors (449961499).

11667023261 is an equidigital number, since it uses as much as digits as its factorization.

11667023261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3543103.

The product of its (nonzero) digits is 18144, while the sum is 35.

Adding to 11667023261 its reverse (16232076611), we get a palindrome (27899099872).

It can be divided in two parts, 116670 and 23261, that added together give a palindrome (139931).

The spelling of 11667023261 in words is "eleven billion, six hundred sixty-seven million, twenty-three thousand, two hundred sixty-one".