253216534666 has 8 divisors (see below), whose sum is σ = 383309433540. Its totient is φ = 125446723488.

The previous prime is 253216534663. The next prime is 253216534687. The reversal of 253216534666 is 666435612352.

253216534666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 219941302441 + 33275232225 = 468979^2 + 182415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×253216534666² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253216534661) 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 3 ways as a sum of consecutive naturals, for example, 580771651 + ... + 580772086.

Almost surely, 2^253216534666 is an apocalyptic number.

253216534666 is a deficient number, since it is larger than the sum of its proper divisors (130092898874).

253216534666 is a wasteful number, since it uses less digits than its factorization.

253216534666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161543848.

The product of its digits is 4665600, while the sum is 49.

The spelling of 253216534666 in words is "two hundred fifty-three billion, two hundred sixteen million, five hundred thirty-four thousand, six hundred sixty-six".