2216666450451 has 8 divisors (see below), whose sum is σ = 2955562153360. Its totient is φ = 1477774190592.

The previous prime is 2216666450443. The next prime is 2216666450459. The reversal of 2216666450451 is 1540546666122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2216666450443) and next prime (2216666450459).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2216666450451 - 2³ = 2216666450443 is a prime.

It is a super-2 number, since 2×2216666450451² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2216666450451.

It is not an unprimeable number, because it can be changed into a prime (2216666450459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1994571 + ... + 2900283.

It is an arithmetic number, because the mean of its divisors is an integer number (369445269170).

Almost surely, 2^{2216666450451} is an apocalyptic number.

2216666450451 is a deficient number, since it is larger than the sum of its proper divisors (738895702909).

2216666450451 is an equidigital number, since it uses as much as digits as its factorization.

2216666450451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721525.

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 2216666450451 in words is "two trillion, two hundred sixteen billion, six hundred sixty-six million, four hundred fifty thousand, four hundred fifty-one".