966201661 has 4 divisors (see below), whose sum is σ = 1017054400. Its totient is φ = 915348924.

The previous prime is 966201617. The next prime is 966201667. The reversal of 966201661 is 166102669.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 966201661 - 2¹¹ = 966199613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 966201661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (966201667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25426341 + ... + 25426378.

It is an arithmetic number, because the mean of its divisors is an integer number (254263600).

Almost surely, 2^966201661 is an apocalyptic number.

It is an amenable number.

966201661 is a deficient number, since it is larger than the sum of its proper divisors (50852739).

966201661 is a wasteful number, since it uses less digits than its factorization.

966201661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50852738.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 966201661 is about 31083.7845347056. The cubic root of 966201661 is about 988.6045233728.

The spelling of 966201661 in words is "nine hundred sixty-six million, two hundred one thousand, six hundred sixty-one".