1665250601101 has 8 divisors (see below), whose sum is σ = 1753401909600. Its totient is φ = 1577149946640.

The previous prime is 1665250601071. The next prime is 1665250601129. The reversal of 1665250601101 is 1011060525661.

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 1665250601101 - 2⁹ = 1665250600589 is a prime.

It is a super-3 number, since 3×1665250601101³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665250601141) 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, 12596011 + ... + 12727528.

It is an arithmetic number, because the mean of its divisors is an integer number (219175238700).

Almost surely, 2^{1665250601101} is an apocalyptic number.

It is an amenable number.

1665250601101 is a deficient number, since it is larger than the sum of its proper divisors (88151308499).

1665250601101 is a wasteful number, since it uses less digits than its factorization.

1665250601101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25327019.

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 1665250601101 in words is "one trillion, six hundred sixty-five billion, two hundred fifty million, six hundred one thousand, one hundred one".