1666221514302 has 8 divisors (see below), whose sum is σ = 3332443028616. Its totient is φ = 555407171432.

The previous prime is 1666221514253. The next prime is 1666221514313. The reversal of 1666221514302 is 2034151226661.

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

1666221514302 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138851792853 + ... + 138851792864.

It is an arithmetic number, because the mean of its divisors is an integer number (416555378577).

Almost surely, 2^{1666221514302} is an apocalyptic number.

1666221514302 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666221514302 is a wasteful number, since it uses less digits than its factorization.

1666221514302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277703585722.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 1666221514302 in words is "one trillion, six hundred sixty-six billion, two hundred twenty-one million, five hundred fourteen thousand, three hundred two".