7616881 has 2 divisors, whose sum is σ = 7616882. Its totient is φ = 7616880.

The previous prime is 7616863. The next prime is 7616897. The reversal of 7616881 is 1886167.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6806881 + 810000 = 2609^2 + 900^2 .

It is a cyclic number.

It is not a de Polignac number, because 7616881 - 2¹¹ = 7614833 is a prime.

It is a super-2 number, since 2×7616881² = 116033752336322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7616881.

It is not a weakly prime, because it can be changed into another prime (7616831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3808440 + 3808441.

It is an arithmetic number, because the mean of its divisors is an integer number (3808441).

Almost surely, 2^7616881 is an apocalyptic number.

It is an amenable number.

7616881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7616881 is an equidigital number, since it uses as much as digits as its factorization.

7616881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 37.

The square root of 7616881 is about 2759.8697433031. The cubic root of 7616881 is about 196.7549755026.

The spelling of 7616881 in words is "seven million, six hundred sixteen thousand, eight hundred eighty-one".