788041661 has 6 divisors (see below), whose sum is σ = 866194686. Its totient is φ = 716401400.

The previous prime is 788041633. The next prime is 788041697. The reversal of 788041661 is 166140887.

It can be written as a sum of positive squares in only one way, i.e., 784336036 + 3705625 = 28006^2 + 1925^2 .

It is a de Polignac number, because none of the positive numbers 2^k-788041661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (788041061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3256250 + ... + 3256491.

It is an arithmetic number, because the mean of its divisors is an integer number (144365781).

Almost surely, 2^788041661 is an apocalyptic number.

It is an amenable number.

788041661 is a deficient number, since it is larger than the sum of its proper divisors (78153025).

788041661 is a wasteful number, since it uses less digits than its factorization.

788041661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6512763 (or 6512752 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 788041661 is about 28072.0797412661. The cubic root of 788041661 is about 923.6690519248.

The spelling of 788041661 in words is "seven hundred eighty-eight million, forty-one thousand, six hundred sixty-one".