53953666 has 16 divisors (see below), whose sum is σ = 88006464. Its totient is φ = 24658704.

The previous prime is 53953649. The next prime is 53953721. The reversal of 53953666 is 66635935.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7396 + ... + 12751.

It is an arithmetic number, because the mean of its divisors is an integer number (5500404).

Almost surely, 2^53953666 is an apocalyptic number.

53953666 is a deficient number, since it is larger than the sum of its proper divisors (34052798).

53953666 is a wasteful number, since it uses less digits than its factorization.

53953666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20265.

The product of its digits is 437400, while the sum is 43.

The square root of 53953666 is about 7345.3159224093. The cubic root of 53953666 is about 377.8681781416.

The spelling of 53953666 in words is "fifty-three million, nine hundred fifty-three thousand, six hundred sixty-six".