1666392572011 has 16 divisors (see below), whose sum is σ = 1763045962560. Its totient is φ = 1571765437440.

The previous prime is 1666392571927. The next prime is 1666392572021. The reversal of 1666392572011 is 1102752936661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1666392572011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666392572021) 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, 7821445 + ... + 8031673.

It is an arithmetic number, because the mean of its divisors is an integer number (110190372660).

Almost surely, 2^{1666392572011} is an apocalyptic number.

1666392572011 is a deficient number, since it is larger than the sum of its proper divisors (96653390549).

1666392572011 is a wasteful number, since it uses less digits than its factorization.

1666392572011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215046.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 1666392572011 in words is "one trillion, six hundred sixty-six billion, three hundred ninety-two million, five hundred seventy-two thousand, eleven".