2667761261 has 16 divisors (see below), whose sum is σ = 3083220288. Its totient is φ = 2281286400.

The previous prime is 2667761249. The next prime is 2667761263. The reversal of 2667761261 is 1621677662.

It is a cyclic number.

It is not a de Polignac number, because 2667761261 - 2¹⁸ = 2667499117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2667761263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 487406 + ... + 492848.

It is an arithmetic number, because the mean of its divisors is an integer number (192701268).

Almost surely, 2^2667761261 is an apocalyptic number.

It is an amenable number.

2667761261 is a deficient number, since it is larger than the sum of its proper divisors (415459027).

2667761261 is a wasteful number, since it uses less digits than its factorization.

2667761261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8092.

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

The square root of 2667761261 is about 51650.3752261298. The cubic root of 2667761261 is about 1386.9122600770.

The spelling of 2667761261 in words is "two billion, six hundred sixty-seven million, seven hundred sixty-one thousand, two hundred sixty-one".