659949956 has 6 divisors (see below), whose sum is σ = 1154912430. Its totient is φ = 329974976.

The previous prime is 659949949. The next prime is 659949967.

659949956 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 644347456 + 15602500 = 25384^2 + 3950^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82493741 + ... + 82493748.

It is an arithmetic number, because the mean of its divisors is an integer number (192485405).

Almost surely, 2^659949956 is an apocalyptic number.

It is an amenable number.

659949956 is a deficient number, since it is larger than the sum of its proper divisors (494962474).

659949956 is a wasteful number, since it uses less digits than its factorization.

659949956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164987493 (or 164987491 counting only the distinct ones).

The product of its digits is 23619600, while the sum is 62.

The square root of 659949956 is about 25689.4911588377. The cubic root of 659949956 is about 870.6367628806.

The spelling of 659949956 in words is "six hundred fifty-nine million, nine hundred forty-nine thousand, nine hundred fifty-six".