53368661 has 4 divisors (see below), whose sum is σ = 56508012. Its totient is φ = 50229312.

The previous prime is 53368643. The next prime is 53368669. The reversal of 53368661 is 16686335.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21446161 + 31922500 = 4631^2 + 5650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53368661 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 (53368669) 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, 1569650 + ... + 1569683.

It is an arithmetic number, because the mean of its divisors is an integer number (14127003).

Almost surely, 2^53368661 is an apocalyptic number.

It is an amenable number.

53368661 is a deficient number, since it is larger than the sum of its proper divisors (3139351).

53368661 is a wasteful number, since it uses less digits than its factorization.

53368661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3139350.

The product of its digits is 77760, while the sum is 38.

The square root of 53368661 is about 7305.3857529907. The cubic root of 53368661 is about 376.4975047262.

The spelling of 53368661 in words is "fifty-three million, three hundred sixty-eight thousand, six hundred sixty-one".