7769665897 has 16 divisors (see below), whose sum is σ = 8916544000. Its totient is φ = 6632072640.

The previous prime is 7769665859. The next prime is 7769665901. The reversal of 7769665897 is 7985669677.

It is a cyclic number.

It is not a de Polignac number, because 7769665897 - 2¹⁵ = 7769633129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7769665837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2536747 + ... + 2539807.

It is an arithmetic number, because the mean of its divisors is an integer number (557284000).

Almost surely, 2^7769665897 is an apocalyptic number.

It is an amenable number.

7769665897 is a deficient number, since it is larger than the sum of its proper divisors (1146878103).

7769665897 is a wasteful number, since it uses less digits than its factorization.

7769665897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4456.

The product of its digits is 240045120, while the sum is 70.

The square root of 7769665897 is about 88145.7083300146. The cubic root of 7769665897 is about 1980.6182724666.

The spelling of 7769665897 in words is "seven billion, seven hundred sixty-nine million, six hundred sixty-five thousand, eight hundred ninety-seven".