7661111 has 2 divisors, whose sum is σ = 7661112. Its totient is φ = 7661110.

The previous prime is 7661099. The next prime is 7661119. The reversal of 7661111 is 1111667.

7661111 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1111667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7661111 - 2¹⁰ = 7660087 is a prime.

It is a Chen prime.

It is an Ulam number.

7661111 is a modest number, since divided by 1111 gives 766 as remainder.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7661119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3830555 + 3830556.

It is an arithmetic number, because the mean of its divisors is an integer number (3830556).

Almost surely, 2^7661111 is an apocalyptic number.

7661111 is a deficient number, since it is larger than the sum of its proper divisors (1).

7661111 is an equidigital number, since it uses as much as digits as its factorization.

7661111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 23.

The square root of 7661111 is about 2767.8712036509. The cubic root of 7661111 is about 197.1350821840.

Adding to 7661111 its reverse (1111667), we get a palindrome (8772778).

The spelling of 7661111 in words is "seven million, six hundred sixty-one thousand, one hundred eleven".