668622145 has 16 divisors (see below), whose sum is σ = 818895168. Its totient is φ = 523955520.

The previous prime is 668622127. The next prime is 668622181. The reversal of 668622145 is 541226866.

It is not a de Polignac number, because 668622145 - 2²⁹ = 131751233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 668622098 and 668622107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55122 + ... + 66148.

It is an arithmetic number, because the mean of its divisors is an integer number (51180948).

Almost surely, 2^668622145 is an apocalyptic number.

It is an amenable number.

668622145 is a deficient number, since it is larger than the sum of its proper divisors (150273023).

668622145 is a wasteful number, since it uses less digits than its factorization.

668622145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11280.

The product of its digits is 138240, while the sum is 40.

The square root of 668622145 is about 25857.7289219297. The cubic root of 668622145 is about 874.4337648100.

The spelling of 668622145 in words is "six hundred sixty-eight million, six hundred twenty-two thousand, one hundred forty-five".