788167661 has 2 divisors, whose sum is σ = 788167662. Its totient is φ = 788167660.

The previous prime is 788167643. The next prime is 788167691. The reversal of 788167661 is 166761887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 471541225 + 316626436 = 21715^2 + 17794^2 .

It is an emirp because it is prime and its reverse (166761887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 788167661 - 2¹⁴ = 788151277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (788167621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394083830 + 394083831.

It is an arithmetic number, because the mean of its divisors is an integer number (394083831).

Almost surely, 2^788167661 is an apocalyptic number.

It is an amenable number.

788167661 is a deficient number, since it is larger than the sum of its proper divisors (1).

788167661 is an equidigital number, since it uses as much as digits as its factorization.

788167661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 50.

The square root of 788167661 is about 28074.3238743162. The cubic root of 788167661 is about 923.7182777902.

The spelling of 788167661 in words is "seven hundred eighty-eight million, one hundred sixty-seven thousand, six hundred sixty-one".