253060661 has 4 divisors (see below), whose sum is σ = 289212192. Its totient is φ = 216909132.

The previous prime is 253060579. The next prime is 253060663. The reversal of 253060661 is 166060352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253060661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253060663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18075755 + ... + 18075768.

It is an arithmetic number, because the mean of its divisors is an integer number (72303048).

Almost surely, 2^253060661 is an apocalyptic number.

It is an amenable number.

253060661 is a deficient number, since it is larger than the sum of its proper divisors (36151531).

253060661 is an equidigital number, since it uses as much as digits as its factorization.

253060661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36151530.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 253060661 is about 15907.8804684974. The cubic root of 253060661 is about 632.5208987663.

The spelling of 253060661 in words is "two hundred fifty-three million, sixty thousand, six hundred sixty-one".