667428145 has 16 divisors (see below), whose sum is σ = 849445632. Its totient is φ = 502349760.

The previous prime is 667428137. The next prime is 667428193. The reversal of 667428145 is 541824766.

It is not a de Polignac number, because 667428145 - 2³ = 667428137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40557 + ... + 54586.

It is an arithmetic number, because the mean of its divisors is an integer number (53090352).

Almost surely, 2^667428145 is an apocalyptic number.

It is an amenable number.

667428145 is a deficient number, since it is larger than the sum of its proper divisors (182017487).

667428145 is a wasteful number, since it uses less digits than its factorization.

667428145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95232.

The product of its digits is 322560, while the sum is 43.

The square root of 667428145 is about 25834.6307308620. The cubic root of 667428145 is about 873.9129444785.

The spelling of 667428145 in words is "six hundred sixty-seven million, four hundred twenty-eight thousand, one hundred forty-five".