668161570 has 16 divisors (see below), whose sum is σ = 1211874048. Its totient is φ = 265223920.

The previous prime is 668161517. The next prime is 668161573. The reversal of 668161570 is 75161866.

668161570 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (668161573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253714 + ... + 256333.

It is an arithmetic number, because the mean of its divisors is an integer number (75742128).

Almost surely, 2^668161570 is an apocalyptic number.

668161570 is a deficient number, since it is larger than the sum of its proper divisors (543712478).

668161570 is a wasteful number, since it uses less digits than its factorization.

668161570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510185.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 668161570 is about 25848.8214431529. The cubic root of 668161570 is about 874.2329364623.

It can be divided in two parts, 66816 and 1570, that added together give a palindrome (68386).

The spelling of 668161570 in words is "six hundred sixty-eight million, one hundred sixty-one thousand, five hundred seventy".