1661050006131 has 16 divisors (see below), whose sum is σ = 2239360732800. Its totient is φ = 1095089354688.

The previous prime is 1661050006111. The next prime is 1661050006163. The reversal of 1661050006131 is 1316000501661.

It is not a de Polignac number, because 1661050006131 - 2⁶ = 1661050006067 is a prime.

It is a super-2 number, since 2×1661050006131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1661050006111) 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, 4364461 + ... + 4729758.

It is an arithmetic number, because the mean of its divisors is an integer number (139960045800).

Almost surely, 2^{1661050006131} is an apocalyptic number.

1661050006131 is a deficient number, since it is larger than the sum of its proper divisors (578310726669).

1661050006131 is a wasteful number, since it uses less digits than its factorization.

1661050006131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9094898.

The product of its (nonzero) digits is 3240, while the sum is 30.

Adding to 1661050006131 its reverse (1316000501661), we get a palindrome (2977050507792).

The spelling of 1661050006131 in words is "one trillion, six hundred sixty-one billion, fifty million, six thousand, one hundred thirty-one".