252466691661 has 12 divisors (see below), whose sum is σ = 364697435388. Its totient is φ = 168300362304.

The previous prime is 252466691621. The next prime is 252466691677. The reversal of 252466691661 is 166196664252.

It can be written as a sum of positive squares in 2 ways, for example, as 51435518436 + 201031173225 = 226794^2 + 448365^2 .

It is not a de Polignac number, because 252466691661 - 2¹¹ = 252466689613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 252466691598 and 252466691607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252466691611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 747280 + ... + 1031193.

It is an arithmetic number, because the mean of its divisors is an integer number (30391452949).

Almost surely, 2^252466691661 is an apocalyptic number.

It is an amenable number.

252466691661 is a deficient number, since it is larger than the sum of its proper divisors (112230743727).

252466691661 is a wasteful number, since it uses less digits than its factorization.

252466691661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794252 (or 1794249 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The spelling of 252466691661 in words is "two hundred fifty-two billion, four hundred sixty-six million, six hundred ninety-one thousand, six hundred sixty-one".