666240253453 has 8 divisors (see below), whose sum is σ = 677352389400. Its totient is φ = 655216660800.

The previous prime is 666240253451. The next prime is 666240253457. The reversal of 666240253453 is 354352042666.

It can be written as a sum of positive squares in 4 ways, for example, as 232567956009 + 433672297444 = 482253^2 + 658538^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 666240253453 - 2¹ = 666240253451 is a prime.

It is a super-2 number, since 2×666240253453² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666240253451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22120650 + ... + 22150747.

It is an arithmetic number, because the mean of its divisors is an integer number (84669048675).

Almost surely, 2^666240253453 is an apocalyptic number.

It is an amenable number.

666240253453 is a deficient number, since it is larger than the sum of its proper divisors (11112135947).

666240253453 is a wasteful number, since it uses less digits than its factorization.

666240253453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44271647.

The product of its (nonzero) digits is 3110400, while the sum is 46.

The spelling of 666240253453 in words is "six hundred sixty-six billion, two hundred forty million, two hundred fifty-three thousand, four hundred fifty-three".