1661052060201 has 16 divisors (see below), whose sum is σ = 2215836380160. Its totient is φ = 1106818016640.

The previous prime is 1661052060139. The next prime is 1661052060209. The reversal of 1661052060201 is 1020602501661.

It is not a de Polignac number, because 1661052060201 - 2¹⁵ = 1661052027433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1661052060209) 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, 91655421 + ... + 91673541.

It is an arithmetic number, because the mean of its divisors is an integer number (138489773760).

Almost surely, 2^{1661052060201} is an apocalyptic number.

It is an amenable number.

1661052060201 is a deficient number, since it is larger than the sum of its proper divisors (554784319959).

1661052060201 is a wasteful number, since it uses less digits than its factorization.

1661052060201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31616.

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 1661052060201 its reverse (1020602501661), we get a palindrome (2681654561862).

The spelling of 1661052060201 in words is "one trillion, six hundred sixty-one billion, fifty-two million, sixty thousand, two hundred one".