7661851 has 2 divisors, whose sum is σ = 7661852. Its totient is φ = 7661850.

The previous prime is 7661837. The next prime is 7661881. The reversal of 7661851 is 1581667.

7661851 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7661851 - 2⁷ = 7661723 is a prime.

It is not a weakly prime, because it can be changed into another prime (7661821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3830925 + 3830926.

It is an arithmetic number, because the mean of its divisors is an integer number (3830926).

Almost surely, 2^7661851 is an apocalyptic number.

7661851 is a deficient number, since it is larger than the sum of its proper divisors (1).

7661851 is an equidigital number, since it uses as much as digits as its factorization.

7661851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 7661851 is about 2768.0048771633. The cubic root of 7661851 is about 197.1414291862.

The spelling of 7661851 in words is "seven million, six hundred sixty-one thousand, eight hundred fifty-one".