75997818669 has 4 divisors (see below), whose sum is σ = 101330424896. Its totient is φ = 50665212444.

The previous prime is 75997818649. The next prime is 75997818679. The reversal of 75997818669 is 96681879957.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 75997818669 - 2⁷ = 75997818541 is a prime.

It is a super-2 number, since 2×75997818669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75997818669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75997818649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12666303109 + ... + 12666303114.

It is an arithmetic number, because the mean of its divisors is an integer number (25332606224).

Almost surely, 2^75997818669 is an apocalyptic number.

It is an amenable number.

75997818669 is a deficient number, since it is larger than the sum of its proper divisors (25332606227).

75997818669 is a wasteful number, since it uses less digits than its factorization.

75997818669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25332606226.

The product of its digits is 411505920, while the sum is 75.

The spelling of 75997818669 in words is "seventy-five billion, nine hundred ninety-seven million, eight hundred eighteen thousand, six hundred sixty-nine".