1001665696911 has 16 divisors (see below), whose sum is σ = 1542672304128. Its totient is φ = 571360112000.

The previous prime is 1001665696897. The next prime is 1001665696951. The reversal of 1001665696911 is 1196965661001.

It is a cyclic number.

It is not a de Polignac number, because 1001665696911 - 2⁹ = 1001665696399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001665696951) 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, 892749615 + ... + 892750736.

It is an arithmetic number, because the mean of its divisors is an integer number (96417019008).

Almost surely, 2^{1001665696911} is an apocalyptic number.

1001665696911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1001665696911 is a deficient number, since it is larger than the sum of its proper divisors (541006607217).

1001665696911 is a wasteful number, since it uses less digits than its factorization.

1001665696911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785500382.

The product of its (nonzero) digits is 524880, while the sum is 51.

The spelling of 1001665696911 in words is "one trillion, one billion, six hundred sixty-five million, six hundred ninety-six thousand, nine hundred eleven".