1666652702697 has 12 divisors (see below), whose sum is σ = 2463372987504. Its totient is φ = 1085262224760.

The previous prime is 1666652702669. The next prime is 1666652702707. The reversal of 1666652702697 is 7962072566661.

It is not a de Polignac number, because 1666652702697 - 2¹⁸ = 1666652440553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1666652701697) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2153297679 + ... + 2153298452.

It is an arithmetic number, because the mean of its divisors is an integer number (205281082292).

Almost surely, 2^{1666652702697} is an apocalyptic number.

It is an amenable number.

1666652702697 is a deficient number, since it is larger than the sum of its proper divisors (796720284807).

1666652702697 is a wasteful number, since it uses less digits than its factorization.

1666652702697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306596180 (or 4306596177 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 63.

The spelling of 1666652702697 in words is "one trillion, six hundred sixty-six billion, six hundred fifty-two million, seven hundred two thousand, six hundred ninety-seven".