665853542 has 8 divisors (see below), whose sum is σ = 1042205616. Its totient is φ = 318451672.

The previous prime is 665853541. The next prime is 665853563. The reversal of 665853542 is 245358566.

665853542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 665853493 and 665853502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665853541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7237493 + ... + 7237584.

It is an arithmetic number, because the mean of its divisors is an integer number (130275702).

Almost surely, 2^665853542 is an apocalyptic number.

665853542 is a deficient number, since it is larger than the sum of its proper divisors (376352074).

665853542 is a wasteful number, since it uses less digits than its factorization.

665853542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14475102.

The product of its digits is 864000, while the sum is 44.

The square root of 665853542 is about 25804.1380789981. The cubic root of 665853542 is about 873.2251553296.

The spelling of 665853542 in words is "six hundred sixty-five million, eight hundred fifty-three thousand, five hundred forty-two".