2167206007661 has 16 divisors (see below), whose sum is σ = 2308794606720. Its totient is φ = 2027188600320.

The previous prime is 2167206007621. The next prime is 2167206007663. The reversal of 2167206007661 is 1667006027612.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2167206007661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2167206007663) 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, 18938705 + ... + 19052793.

It is an arithmetic number, because the mean of its divisors is an integer number (144299662920).

Almost surely, 2^{2167206007661} is an apocalyptic number.

It is an amenable number.

2167206007661 is a deficient number, since it is larger than the sum of its proper divisors (141588599059).

2167206007661 is a wasteful number, since it uses less digits than its factorization.

2167206007661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120964.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 2167206007661 in words is "two trillion, one hundred sixty-seven billion, two hundred six million, seven thousand, six hundred sixty-one".