657161606 has 8 divisors (see below), whose sum is σ = 991440864. Its totient is φ = 326681320.

The previous prime is 657161539. The next prime is 657161623. The reversal of 657161606 is 606161756.

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

It is a super-2 number, since 2×657161606² = 863722752800998472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 657161606.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 949310 + ... + 950001.

It is an arithmetic number, because the mean of its divisors is an integer number (123930108).

Almost surely, 2^657161606 is an apocalyptic number.

657161606 is a deficient number, since it is larger than the sum of its proper divisors (334279258).

657161606 is a wasteful number, since it uses less digits than its factorization.

657161606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899486.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 657161606 is about 25635.1634673938. The cubic root of 657161606 is about 869.4088581254.

The spelling of 657161606 in words is "six hundred fifty-seven million, one hundred sixty-one thousand, six hundred six".