1666290277663 has 8 divisors (see below), whose sum is σ = 1820012616576. Its totient is φ = 1512941506200.

The previous prime is 1666290277661. The next prime is 1666290277697. The reversal of 1666290277663 is 3667720926661.

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 1666290277663 - 2¹ = 1666290277661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666290277661) 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, 93382531 + ... + 93400372.

It is an arithmetic number, because the mean of its divisors is an integer number (227501577072).

Almost surely, 2^{1666290277663} is an apocalyptic number.

1666290277663 is a deficient number, since it is larger than the sum of its proper divisors (153722338913).

1666290277663 is a wasteful number, since it uses less digits than its factorization.

1666290277663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186783725.

The product of its (nonzero) digits is 41150592, while the sum is 61.

The spelling of 1666290277663 in words is "one trillion, six hundred sixty-six billion, two hundred ninety million, two hundred seventy-seven thousand, six hundred sixty-three".