1662669221472 has 180 divisors, whose sum is σ = 5688209571660. Its totient is φ = 475048312704.

The previous prime is 1662669221471. The next prime is 1662669221491. The reversal of 1662669221472 is 2741229662661.

1662669221472 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 66 + 92 + 21 + 472 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662669221471) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 6418522 + ... + 6672537.

It is an arithmetic number, because the mean of its divisors is an integer number (31601164287).

Almost surely, 2^{1662669221472} is an apocalyptic number.

1662669221472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1662669221472 is an abundant number, since it is smaller than the sum of its proper divisors (4025540350188).

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

1662669221472 is a wasteful number, since it uses less digits than its factorization.

1662669221472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13091095 (or 13091071 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 1662669221472 in words is "one trillion, six hundred sixty-two billion, six hundred sixty-nine million, two hundred twenty-one thousand, four hundred seventy-two".