665226042 has 32 divisors (see below), whose sum is σ = 1440741120. Its totient is φ = 203549760.

The previous prime is 665225969. The next prime is 665226047. The reversal of 665226042 is 240622566.

It is a junction number, because it is equal to n+sod(n) for n = 665225994 and 665226012.

It is not an unprimeable number, because it can be changed into a prime (665226047) 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, 9442 + ... + 37677.

It is an arithmetic number, because the mean of its divisors is an integer number (45023160).

Almost surely, 2^665226042 is an apocalyptic number.

665226042 is an abundant number, since it is smaller than the sum of its proper divisors (775515078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665226042 is a wasteful number, since it uses less digits than its factorization.

665226042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47318.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 665226042 is about 25791.9763104730. The cubic root of 665226042 is about 872.9507601514.

The spelling of 665226042 in words is "six hundred sixty-five million, two hundred twenty-six thousand, forty-two".