52631666 has 4 divisors (see below), whose sum is σ = 78947502. Its totient is φ = 26315832.

The previous prime is 52631647. The next prime is 52631669. The reversal of 52631666 is 66613625.

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., 50822641 + 1809025 = 7129^2 + 1345^2 .

It is not an unprimeable number, because it can be changed into a prime (52631669) 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 as a sum of consecutive naturals, namely, 13157915 + ... + 13157918.

Almost surely, 2^52631666 is an apocalyptic number.

52631666 is a deficient number, since it is larger than the sum of its proper divisors (26315836).

52631666 is a wasteful number, since it uses less digits than its factorization.

52631666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26315835.

The product of its digits is 38880, while the sum is 35.

The square root of 52631666 is about 7254.7685007862. The cubic root of 52631666 is about 374.7563833998.

The spelling of 52631666 in words is "fifty-two million, six hundred thirty-one thousand, six hundred sixty-six".