1666714536960 has 352 divisors, whose sum is σ = 5838825855744. Its totient is φ = 402432000000.

The previous prime is 1666714536923. The next prime is 1666714536961. The reversal of 1666714536960 is 696354176661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (352).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 1666714536894 and 1666714536903.

It is not an unprimeable number, because it can be changed into a prime (1666714536961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42389310 + ... + 42428610.

Almost surely, 2^{1666714536960} is an apocalyptic number.

1666714536960 is a gapful number since it is divisible by the number (10) 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 1666714536960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2919412927872).

1666714536960 is an abundant number, since it is smaller than the sum of its proper divisors (4172111318784).

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

1666714536960 is a wasteful number, since it uses less digits than its factorization.

1666714536960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39591 (or 39573 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 60.

The spelling of 1666714536960 in words is "one trillion, six hundred sixty-six billion, seven hundred fourteen million, five hundred thirty-six thousand, nine hundred sixty".