675675836721 has 24 divisors (see below), whose sum is σ = 992598256104. Its totient is φ = 442788111360.

The previous prime is 675675836699. The next prime is 675675836767. The reversal of 675675836721 is 127638576576.

It is a happy number.

675675836721 is a `hidden beast` number, since 6 + 7 + 567 + 5 + 8 + 3 + 67 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 77528276721 + 598147560000 = 278439^2 + 773400^2 .

It is not a de Polignac number, because 675675836721 - 2²¹ = 675673739569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (675675636721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 491425 + ... + 1262081.

It is an arithmetic number, because the mean of its divisors is an integer number (41358260671).

Almost surely, 2^675675836721 is an apocalyptic number.

675675836721 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

675675836721 is a deficient number, since it is larger than the sum of its proper divisors (316922419383).

675675836721 is a wasteful number, since it uses less digits than its factorization.

675675836721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772321 (or 772318 counting only the distinct ones).

The product of its digits is 88905600, while the sum is 63.

The spelling of 675675836721 in words is "six hundred seventy-five billion, six hundred seventy-five million, eight hundred thirty-six thousand, seven hundred twenty-one".