665679522 has 16 divisors (see below), whose sum is σ = 1336275072. Its totient is φ = 221073840.

The previous prime is 665679499. The next prime is 665679527. The reversal of 665679522 is 225976566.

It is not an unprimeable number, because it can be changed into a prime (665679527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203073 + ... + 206324.

It is an arithmetic number, because the mean of its divisors is an integer number (83517192).

Almost surely, 2^665679522 is an apocalyptic number.

665679522 is an abundant number, since it is smaller than the sum of its proper divisors (670595550).

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

665679522 is a wasteful number, since it uses less digits than its factorization.

665679522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409673.

The product of its digits is 1360800, while the sum is 48.

The square root of 665679522 is about 25800.7659188637. The cubic root of 665679522 is about 873.1490765966.

The spelling of 665679522 in words is "six hundred sixty-five million, six hundred seventy-nine thousand, five hundred twenty-two".