659878445 has 8 divisors (see below), whose sum is σ = 792025344. Its totient is φ = 527788624.

The previous prime is 659878423. The next prime is 659878459. The reversal of 659878445 is 544878956.

It is a happy number.

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 659878445 - 2¹⁴ = 659862061 is a prime.

It is a Duffinian number.

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, 17672 + ... + 40398.

It is an arithmetic number, because the mean of its divisors is an integer number (99003168).

Almost surely, 2^659878445 is an apocalyptic number.

It is an amenable number.

659878445 is a deficient number, since it is larger than the sum of its proper divisors (132146899).

659878445 is a wasteful number, since it uses less digits than its factorization.

659878445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28539.

The product of its digits is 9676800, while the sum is 56.

The square root of 659878445 is about 25688.0992874132. The cubic root of 659878445 is about 870.6053148625.

The spelling of 659878445 in words is "six hundred fifty-nine million, eight hundred seventy-eight thousand, four hundred forty-five".