53571666 has 16 divisors (see below), whose sum is σ = 109757088. Its totient is φ = 17421600.

The previous prime is 53571653. The next prime is 53571667. The reversal of 53571666 is 66617535.

It is not an unprimeable number, because it can be changed into a prime (53571667) by changing a digit.

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, 108640 + ... + 109131.

It is an arithmetic number, because the mean of its divisors is an integer number (6859818).

Almost surely, 2^53571666 is an apocalyptic number.

53571666 is an abundant number, since it is smaller than the sum of its proper divisors (56185422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53571666 is a wasteful number, since it uses less digits than its factorization.

53571666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217817.

The product of its digits is 113400, while the sum is 39.

The square root of 53571666 is about 7319.2667665552. The cubic root of 53571666 is about 376.9742774796.

The spelling of 53571666 in words is "fifty-three million, five hundred seventy-one thousand, six hundred sixty-six".