789771661 has 12 divisors (see below), whose sum is σ = 921134592. Its totient is φ = 675163608.

The previous prime is 789771629. The next prime is 789771673. The reversal of 789771661 is 166177987.

It is not a de Polignac number, because 789771661 - 2⁵ = 789771629 is a prime.

It is a super-3 number, since 3×789771661³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 789771599 and 789771608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (789771061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2275 + ... + 39808.

It is an arithmetic number, because the mean of its divisors is an integer number (76761216).

Almost surely, 2^789771661 is an apocalyptic number.

It is an amenable number.

789771661 is a deficient number, since it is larger than the sum of its proper divisors (131362931).

789771661 is a wasteful number, since it uses less digits than its factorization.

789771661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42480 (or 42473 counting only the distinct ones).

The product of its digits is 889056, while the sum is 52.

The square root of 789771661 is about 28102.8763830324. The cubic root of 789771661 is about 924.3444728786.

The spelling of 789771661 in words is "seven hundred eighty-nine million, seven hundred seventy-one thousand, six hundred sixty-one".