16662207220069 has 4 divisors (see below), whose sum is σ = 16689657314944. Its totient is φ = 16634757125196.

The previous prime is 16662207219991. The next prime is 16662207220103. The reversal of 16662207220069 is 96002270226661.

It is a happy number.

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 16662207220069 - 2²¹ = 16662205122917 is a prime.

It is a super-2 number, since 2×16662207220069² (a number of 27 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 (16662207200069) 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, 13725046527 + ... + 13725047740.

It is an arithmetic number, because the mean of its divisors is an integer number (4172414328736).

Almost surely, 2^{16662207220069} is an apocalyptic number.

It is an amenable number.

16662207220069 is a deficient number, since it is larger than the sum of its proper divisors (27450094875).

16662207220069 is an equidigital number, since it uses as much as digits as its factorization.

16662207220069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27450094874.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 16662207220069 in words is "sixteen trillion, six hundred sixty-two billion, two hundred seven million, two hundred twenty thousand, sixty-nine".