53501666 has 4 divisors (see below), whose sum is σ = 80252502. Its totient is φ = 26750832.

The previous prime is 53501659. The next prime is 53501677. The reversal of 53501666 is 66610535.

53501666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 52258441 + 1243225 = 7229^2 + 1115^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13375415 + ... + 13375418.

Almost surely, 2^53501666 is an apocalyptic number.

53501666 is a deficient number, since it is larger than the sum of its proper divisors (26750836).

53501666 is a wasteful number, since it uses less digits than its factorization.

53501666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26750835.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 53501666 is about 7314.4833036927. The cubic root of 53501666 is about 376.8100133998.

The spelling of 53501666 in words is "fifty-three million, five hundred one thousand, six hundred sixty-six".