667202645 has 8 divisors (see below), whose sum is σ = 801154104. Its totient is φ = 533421504.

The previous prime is 667202639. The next prime is 667202693. The reversal of 667202645 is 546202766.

667202645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 172318129 + 494884516 = 13127^2 + 22246^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 667202645 - 2⁴ = 667202629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 667202599 and 667202608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33794 + ... + 49763.

It is an arithmetic number, because the mean of its divisors is an integer number (100144263).

Almost surely, 2^667202645 is an apocalyptic number.

It is an amenable number.

667202645 is a deficient number, since it is larger than the sum of its proper divisors (133951459).

667202645 is a wasteful number, since it uses less digits than its factorization.

667202645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85159.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 667202645 is about 25830.2660652189. The cubic root of 667202645 is about 873.8145121261.

The spelling of 667202645 in words is "six hundred sixty-seven million, two hundred two thousand, six hundred forty-five".