1662661469448 has 320 divisors, whose sum is σ = 5697369216000. Its totient is φ = 442414493568.

The previous prime is 1662661469437. The next prime is 1662661469453. The reversal of 1662661469448 is 8449641662661.

It is a happy number.

1662661469448 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 6 + 614 + 6 + 9 + 4 + 4 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4921365 + ... + 5248347.

It is an arithmetic number, because the mean of its divisors is an integer number (17804278800).

Almost surely, 2^{1662661469448} is an apocalyptic number.

1662661469448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1662661469448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2848684608000).

1662661469448 is an abundant number, since it is smaller than the sum of its proper divisors (4034707746552).

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

1662661469448 is a wasteful number, since it uses less digits than its factorization.

1662661469448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327086 (or 327073 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 63.

The spelling of 1662661469448 in words is "one trillion, six hundred sixty-two billion, six hundred sixty-one million, four hundred sixty-nine thousand, four hundred forty-eight".