7665941389 has 2 divisors, whose sum is σ = 7665941390. Its totient is φ = 7665941388.

The previous prime is 7665941383. The next prime is 7665941441. The reversal of 7665941389 is 9831495667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5114681289 + 2551260100 = 71517^2 + 50510^2 .

It is a cyclic number.

It is not a de Polignac number, because 7665941389 - 2³¹ = 5518457741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7665941383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832970694 + 3832970695.

It is an arithmetic number, because the mean of its divisors is an integer number (3832970695).

Almost surely, 2^7665941389 is an apocalyptic number.

It is an amenable number.

7665941389 is a deficient number, since it is larger than the sum of its proper divisors (1).

7665941389 is an equidigital number, since it uses as much as digits as its factorization.

7665941389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 58.

The square root of 7665941389 is about 87555.3618518021. The cubic root of 7665941389 is about 1971.7650520443.

The spelling of 7665941389 in words is "seven billion, six hundred sixty-five million, nine hundred forty-one thousand, three hundred eighty-nine".