659999942 has 32 divisors (see below), whose sum is σ = 1199499840. Its totient is φ = 265881600.

The previous prime is 659999929. The next prime is 659999971. The reversal of 659999942 is 249999956.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284684 + ... + 286992.

It is an arithmetic number, because the mean of its divisors is an integer number (37484370).

Almost surely, 2^659999942 is an apocalyptic number.

659999942 is a deficient number, since it is larger than the sum of its proper divisors (539499898).

659999942 is a wasteful number, since it uses less digits than its factorization.

659999942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536.

The product of its digits is 14171760, while the sum is 62.

The square root of 659999942 is about 25690.4640285068. The cubic root of 659999942 is about 870.6587436132.

The spelling of 659999942 in words is "six hundred fifty-nine million, nine hundred ninety-nine thousand, nine hundred forty-two".