1666760183487 has 24 divisors (see below), whose sum is σ = 2751640644480. Its totient is φ = 952377788880.

The previous prime is 1666760183483. The next prime is 1666760183531. The reversal of 1666760183487 is 7843810676661.

It is a happy number.

It is not a de Polignac number, because 1666760183487 - 2² = 1666760183483 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666760183483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 294064 + ... + 1849322.

It is an arithmetic number, because the mean of its divisors is an integer number (114651693520).

Almost surely, 2^{1666760183487} is an apocalyptic number.

1666760183487 is a deficient number, since it is larger than the sum of its proper divisors (1084880460993).

1666760183487 is a wasteful number, since it uses less digits than its factorization.

1666760183487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572283 (or 1572280 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 63.

The spelling of 1666760183487 in words is "one trillion, six hundred sixty-six billion, seven hundred sixty million, one hundred eighty-three thousand, four hundred eighty-seven".