1666225220662 has 8 divisors (see below), whose sum is σ = 2499343728336. Its totient is φ = 833110644552.

The previous prime is 1666225220659. The next prime is 1666225220663. The reversal of 1666225220662 is 2660225226661.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666225220663) 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, 562743 + ... + 1910269.

It is an arithmetic number, because the mean of its divisors is an integer number (312417966042).

Almost surely, 2^{1666225220662} is an apocalyptic number.

1666225220662 is a deficient number, since it is larger than the sum of its proper divisors (833118507674).

1666225220662 is a wasteful number, since it uses less digits than its factorization.

1666225220662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965782.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 1666225220662 in words is "one trillion, six hundred sixty-six billion, two hundred twenty-five million, two hundred twenty thousand, six hundred sixty-two".