1660716287999 has 8 divisors (see below), whose sum is σ = 1748169795840. Its totient is φ = 1573267518936.

The previous prime is 1660716287983. The next prime is 1660716288059. The reversal of 1660716287999 is 9997826170661.

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

It is a cyclic number.

It is not a de Polignac number, because 1660716287999 - 2⁴ = 1660716287983 is a prime.

It is a super-2 number, since 2×1660716287999² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660776287999) 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, 453767 + ... + 1878120.

It is an arithmetic number, because the mean of its divisors is an integer number (218521224480).

Almost surely, 2^{1660716287999} is an apocalyptic number.

1660716287999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1660716287999 is a deficient number, since it is larger than the sum of its proper divisors (87453507841).

1660716287999 is a wasteful number, since it uses less digits than its factorization.

1660716287999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369389.

The product of its (nonzero) digits is 123451776, while the sum is 71.

The spelling of 1660716287999 in words is "one trillion, six hundred sixty billion, seven hundred sixteen million, two hundred eighty-seven thousand, nine hundred ninety-nine".