273663661 has 4 divisors (see below), whose sum is σ = 273699712. Its totient is φ = 273627612.

The previous prime is 273663619. The next prime is 273663667. The reversal of 273663661 is 166366372.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 273663661 - 2⁹ = 273663149 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 (273663667) 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, 1725 + ... + 23458.

It is an arithmetic number, because the mean of its divisors is an integer number (68424928).

Almost surely, 2^273663661 is an apocalyptic number.

It is an amenable number.

273663661 is a deficient number, since it is larger than the sum of its proper divisors (36051).

273663661 is a wasteful number, since it uses less digits than its factorization.

273663661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36050.

The product of its digits is 163296, while the sum is 40.

The square root of 273663661 is about 16542.7827465635. The cubic root of 273663661 is about 649.2406604138.

The spelling of 273663661 in words is "two hundred seventy-three million, six hundred sixty-three thousand, six hundred sixty-one".