11666621520303 has 4 divisors (see below), whose sum is σ = 15555495360408. Its totient is φ = 7777747680200.

The previous prime is 11666621520283. The next prime is 11666621520319. The reversal of 11666621520303 is 30302512666611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11666621520303 - 2¹³ = 11666621512111 is a prime.

It is a super-2 number, since 2×11666621520303² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666621520353) 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, 1944436920048 + ... + 1944436920053.

It is an arithmetic number, because the mean of its divisors is an integer number (3888873840102).

Almost surely, 2^{11666621520303} is an apocalyptic number.

11666621520303 is a deficient number, since it is larger than the sum of its proper divisors (3888873840105).

11666621520303 is an equidigital number, since it uses as much as digits as its factorization.

11666621520303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888873840104.

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 11666621520303 in words is "eleven trillion, six hundred sixty-six billion, six hundred twenty-one million, five hundred twenty thousand, three hundred three".