7667216881 has 16 divisors (see below), whose sum is σ = 8110166400. Its totient is φ = 7238020608.

The previous prime is 7667216861. The next prime is 7667216959. The reversal of 7667216881 is 1886127667.

It is a cyclic number.

It is not a de Polignac number, because 7667216881 - 2²¹ = 7665119729 is a prime.

It is a super-2 number, since 2×7667216881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7667216861) 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, 217060 + ... + 249898.

It is an arithmetic number, because the mean of its divisors is an integer number (506885400).

Almost surely, 2^7667216881 is an apocalyptic number.

It is an amenable number.

7667216881 is a deficient number, since it is larger than the sum of its proper divisors (442949519).

7667216881 is a wasteful number, since it uses less digits than its factorization.

7667216881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33048.

The product of its digits is 1354752, while the sum is 52.

The square root of 7667216881 is about 87562.6454659748. The cubic root of 7667216881 is about 1971.8744028707.

The spelling of 7667216881 in words is "seven billion, six hundred sixty-seven million, two hundred sixteen thousand, eight hundred eighty-one".