2667159331561 has 2 divisors, whose sum is σ = 2667159331562. Its totient is φ = 2667159331560.

The previous prime is 2667159331541. The next prime is 2667159331589. The reversal of 2667159331561 is 1651339517662.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2658918323161 + 8241008400 = 1630619^2 + 90780^2 .

It is a cyclic number.

It is not a de Polignac number, because 2667159331561 - 2¹⁹ = 2667158807273 is a prime.

It is a super-2 number, since 2×2667159331561² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2667159331541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333579665780 + 1333579665781.

It is an arithmetic number, because the mean of its divisors is an integer number (1333579665781).

Almost surely, 2^{2667159331561} is an apocalyptic number.

It is an amenable number.

2667159331561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2667159331561 is an equidigital number, since it uses as much as digits as its factorization.

2667159331561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6123600, while the sum is 55.

The spelling of 2667159331561 in words is "two trillion, six hundred sixty-seven billion, one hundred fifty-nine million, three hundred thirty-one thousand, five hundred sixty-one".