662639086 has 4 divisors (see below), whose sum is σ = 993958632. Its totient is φ = 331319542.

The previous prime is 662639053. The next prime is 662639093. The reversal of 662639086 is 680936266.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165659770 + ... + 165659773.

It is an arithmetic number, because the mean of its divisors is an integer number (248489658).

Almost surely, 2^662639086 is an apocalyptic number.

662639086 is a deficient number, since it is larger than the sum of its proper divisors (331319546).

662639086 is a wasteful number, since it uses less digits than its factorization.

662639086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331319545.

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 662639086 is about 25741.7770559843. Note that the first 3 decimals coincide. The cubic root of 662639086 is about 871.8177022267.

The spelling of 662639086 in words is "six hundred sixty-two million, six hundred thirty-nine thousand, eighty-six".