4016656145661 has 4 divisors (see below), whose sum is σ = 5355541527552. Its totient is φ = 2677770763772.

The previous prime is 4016656145653. The next prime is 4016656145669. The reversal of 4016656145661 is 1665416566104.

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 an interprime number because it is at equal distance from previous prime (4016656145653) and next prime (4016656145669).

It is a cyclic number.

It is not a de Polignac number, because 4016656145661 - 2³ = 4016656145653 is a prime.

It is a super-2 number, since 2×4016656145661² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4016656145669) 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, 669442690941 + ... + 669442690946.

It is an arithmetic number, because the mean of its divisors is an integer number (1338885381888).

Almost surely, 2^{4016656145661} is an apocalyptic number.

It is an amenable number.

4016656145661 is a deficient number, since it is larger than the sum of its proper divisors (1338885381891).

4016656145661 is a wasteful number, since it uses less digits than its factorization.

4016656145661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338885381890.

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 4016656145661 in words is "four trillion, sixteen billion, six hundred fifty-six million, one hundred forty-five thousand, six hundred sixty-one".