1660005502321 has 8 divisors (see below), whose sum is σ = 1755348069888. Its totient is φ = 1567275060000.

The previous prime is 1660005502231. The next prime is 1660005502357. The reversal of 1660005502321 is 1232055000661.

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

It is not a de Polignac number, because 1660005502321 - 2¹⁷ = 1660005371249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660005502391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653030005 + ... + 653032546.

It is an arithmetic number, because the mean of its divisors is an integer number (219418508736).

Almost surely, 2^{1660005502321} is an apocalyptic number.

It is an amenable number.

1660005502321 is a deficient number, since it is larger than the sum of its proper divisors (95342567567).

1660005502321 is a wasteful number, since it uses less digits than its factorization.

1660005502321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306062623.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 1660005502321 in words is "one trillion, six hundred sixty billion, five million, five hundred two thousand, three hundred twenty-one".