11666151500001 has 4 divisors (see below), whose sum is σ = 15554868666672. Its totient is φ = 7777434333332.

The previous prime is 11666151499987. The next prime is 11666151500009. The reversal of 11666151500001 is 10000515166611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11666151500001 - 2²³ = 11666143111393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11666151500009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1944358583331 + ... + 1944358583336.

It is an arithmetic number, because the mean of its divisors is an integer number (3888717166668).

Almost surely, 2^{11666151500001} is an apocalyptic number.

It is an amenable number.

11666151500001 is a deficient number, since it is larger than the sum of its proper divisors (3888717166671).

11666151500001 is an equidigital number, since it uses as much as digits as its factorization.

11666151500001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888717166670.

The product of its (nonzero) digits is 5400, while the sum is 33.

Adding to 11666151500001 its reverse (10000515166611), we get a palindrome (21666666666612).

The spelling of 11666151500001 in words is "eleven trillion, six hundred sixty-six billion, one hundred fifty-one million, five hundred thousand, one".