16166651241 has 32 divisors (see below), whose sum is σ = 23763479040. Its totient is φ = 9714069504.

The previous prime is 16166651213. The next prime is 16166651243. The reversal of 16166651241 is 14215666161.

It is a happy number.

It is not a de Polignac number, because 16166651241 - 2⁷ = 16166651113 is a prime.

It is a super-2 number, since 2×16166651241² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 16166651241.

It is not an unprimeable number, because it can be changed into a prime (16166651243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 783505 + ... + 803873.

It is an arithmetic number, because the mean of its divisors is an integer number (742608720).

Almost surely, 2^16166651241 is an apocalyptic number.

It is an amenable number.

16166651241 is a deficient number, since it is larger than the sum of its proper divisors (7596827799).

16166651241 is a wasteful number, since it uses less digits than its factorization.

16166651241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20865.

The product of its digits is 51840, while the sum is 39.

The spelling of 16166651241 in words is "sixteen billion, one hundred sixty-six million, six hundred fifty-one thousand, two hundred forty-one".