659775657 has 4 divisors (see below), whose sum is σ = 879700880. Its totient is φ = 439850436.

The previous prime is 659775653. The next prime is 659775659. The reversal of 659775657 is 756577956.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 659775657 - 2² = 659775653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 659775597 and 659775606.

It is not an unprimeable number, because it can be changed into a prime (659775653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109962607 + ... + 109962612.

It is an arithmetic number, because the mean of its divisors is an integer number (219925220).

Almost surely, 2^659775657 is an apocalyptic number.

It is an amenable number.

659775657 is a deficient number, since it is larger than the sum of its proper divisors (219925223).

659775657 is a wasteful number, since it uses less digits than its factorization.

659775657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219925222.

The product of its digits is 13891500, while the sum is 57.

The square root of 659775657 is about 25686.0985165128. The cubic root of 659775657 is about 870.5601083417.

The spelling of 659775657 in words is "six hundred fifty-nine million, seven hundred seventy-five thousand, six hundred fifty-seven".