16660381485 has 16 divisors (see below), whose sum is σ = 29079938880. Its totient is φ = 8077760640.

The previous prime is 16660381481. The next prime is 16660381511. The reversal of 16660381485 is 58418306661.

It is not a de Polignac number, because 16660381485 - 2² = 16660381481 is a prime.

It is a super-2 number, since 2×16660381485² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660381481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50485840 + ... + 50486169.

It is an arithmetic number, because the mean of its divisors is an integer number (1817496180).

Almost surely, 2^16660381485 is an apocalyptic number.

16660381485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16660381485 is a deficient number, since it is larger than the sum of its proper divisors (12419557395).

16660381485 is a wasteful number, since it uses less digits than its factorization.

16660381485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100972028.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 16660381485 in words is "sixteen billion, six hundred sixty million, three hundred eighty-one thousand, four hundred eighty-five".