53705661 has 4 divisors (see below), whose sum is σ = 71607552. Its totient is φ = 35803772.

The previous prime is 53705627. The next prime is 53705683. The reversal of 53705661 is 16650735.

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 not a de Polignac number, because 53705661 - 2⁹ = 53705149 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53704661) 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, 8950941 + ... + 8950946.

It is an arithmetic number, because the mean of its divisors is an integer number (17901888).

Almost surely, 2^53705661 is an apocalyptic number.

It is an amenable number.

53705661 is a deficient number, since it is larger than the sum of its proper divisors (17901891).

53705661 is a wasteful number, since it uses less digits than its factorization.

53705661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17901890.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 53705661 is about 7328.4146307370. The cubic root of 53705661 is about 377.2883154523.

The spelling of 53705661 in words is "fifty-three million, seven hundred five thousand, six hundred sixty-one".