253403466661 has 8 divisors (see below), whose sum is σ = 253843726104. Its totient is φ = 252963348480.

The previous prime is 253403466647. The next prime is 253403466677. The reversal of 253403466661 is 166664304352.

It can be written as a sum of positive squares in 4 ways, for example, as 155039062500 + 98364404161 = 393750^2 + 313631^2 .

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 253403466661 - 2⁵ = 253403466629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253403466601) 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, 3940381 + ... + 4004173.

It is an arithmetic number, because the mean of its divisors is an integer number (31730465763).

Almost surely, 2^253403466661 is an apocalyptic number.

It is an amenable number.

253403466661 is a deficient number, since it is larger than the sum of its proper divisors (440259443).

253403466661 is an equidigital number, since it uses as much as digits as its factorization.

253403466661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70631.

The product of its (nonzero) digits is 1866240, while the sum is 46.

The spelling of 253403466661 in words is "two hundred fifty-three billion, four hundred three million, four hundred sixty-six thousand, six hundred sixty-one".