11666006555413 has 6 divisors (see below), whose sum is σ = 13570660686966. Its totient is φ = 9999434190312.

The previous prime is 11666006555339. The next prime is 11666006555449. The reversal of 11666006555413 is 31455560066611.

It can be written as a sum of positive squares in only one way, i.e., 10673596100209 + 992410455204 = 3267047^2 + 996198^2 .

It is not a de Polignac number, because 11666006555413 - 2²¹ = 11666004458261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 238081766437 = 11666006555413 / (1 + 1 + 6 + 6 + 6 + 0 + 0 + 6 + 5 + 5 + 5 + 4 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666006555213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119040883170 + ... + 119040883267.

It is an arithmetic number, because the mean of its divisors is an integer number (2261776781161).

Almost surely, 2^{11666006555413} is an apocalyptic number.

It is an amenable number.

11666006555413 is a deficient number, since it is larger than the sum of its proper divisors (1904654131553).

11666006555413 is an equidigital number, since it uses as much as digits as its factorization.

11666006555413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238081766451 (or 238081766444 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 49.

The spelling of 11666006555413 in words is "eleven trillion, six hundred sixty-six billion, six million, five hundred fifty-five thousand, four hundred thirteen".