769589661 has 32 divisors (see below), whose sum is σ = 1100390400. Its totient is φ = 477005760.

The previous prime is 769589659. The next prime is 769589707. The reversal of 769589661 is 166985967.

It is a happy number.

It is not a de Polignac number, because 769589661 - 2¹ = 769589659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (769589651) 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 31 ways as a sum of consecutive naturals, for example, 1606420 + ... + 1606898.

It is an arithmetic number, because the mean of its divisors is an integer number (34387200).

Almost surely, 2^769589661 is an apocalyptic number.

769589661 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

769589661 is a deficient number, since it is larger than the sum of its proper divisors (330800739).

769589661 is a wasteful number, since it uses less digits than its factorization.

769589661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969.

The product of its digits is 4898880, while the sum is 57.

The square root of 769589661 is about 27741.4790701577. The cubic root of 769589661 is about 916.4028015112.

The spelling of 769589661 in words is "seven hundred sixty-nine million, five hundred eighty-nine thousand, six hundred sixty-one".