668135037 has 16 divisors (see below), whose sum is σ = 944447040. Its totient is φ = 418689792.

The previous prime is 668135029. The next prime is 668135047. The reversal of 668135037 is 730531866.

It is not a de Polignac number, because 668135037 - 2³ = 668135029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 668134986 and 668135004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668135047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34378 + ... + 50180.

It is an arithmetic number, because the mean of its divisors is an integer number (59027940).

Almost surely, 2^668135037 is an apocalyptic number.

It is an amenable number.

668135037 is a deficient number, since it is larger than the sum of its proper divisors (276312003).

668135037 is a wasteful number, since it uses less digits than its factorization.

668135037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16652.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 668135037 is about 25848.3082038264. The cubic root of 668135037 is about 874.2213642465.

The spelling of 668135037 in words is "six hundred sixty-eight million, one hundred thirty-five thousand, thirty-seven".