2667534961081 has 27 divisors (see below), whose sum is σ = 2860197007941. Its totient is φ = 2487479589144.

The previous prime is 2667534961051. The next prime is 2667534961109. The reversal of 2667534961081 is 1801694357662.

The square root of 2667534961081 is 1633259.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 2667534961081 - 2¹³ = 2667534952889 is a prime.

It is a super-2 number, since 2×2667534961081² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2667534961051) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2079138066 + ... + 2079139348.

It is a 1-persistent number, because it is pandigital, but 2⋅2667534961081 = 5335069922162 is not.

Almost surely, 2^{2667534961081} is an apocalyptic number.

2667534961081 is the 1633259-th square number.

2667534961081 is the 816630-th centered octagonal number.

It is an amenable number.

2667534961081 is a deficient number, since it is larger than the sum of its proper divisors (192662046860).

2667534961081 is an frugal number, since it uses more digits than its factorization.

2667534961081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2738 (or 1369 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 2667534961081 in words is "two trillion, six hundred sixty-seven billion, five hundred thirty-four million, nine hundred sixty-one thousand, eighty-one".