667100345 has 4 divisors (see below), whose sum is σ = 800520420. Its totient is φ = 533680272.

The previous prime is 667100327. The next prime is 667100351. The reversal of 667100345 is 543001766.

667100345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 151265401 + 515834944 = 12299^2 + 22712^2 .

It is a cyclic number.

It is not a de Polignac number, because 667100345 - 2¹⁸ = 666838201 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66710030 + ... + 66710039.

It is an arithmetic number, because the mean of its divisors is an integer number (200130105).

Almost surely, 2^667100345 is an apocalyptic number.

It is an amenable number.

667100345 is a deficient number, since it is larger than the sum of its proper divisors (133420075).

667100345 is a wasteful number, since it uses less digits than its factorization.

667100345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133420074.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 667100345 is about 25828.2857541882. The cubic root of 667100345 is about 873.7698501361.

The spelling of 667100345 in words is "six hundred sixty-seven million, one hundred thousand, three hundred forty-five".