665037042 has 64 divisors (see below), whose sum is σ = 1491830784. Its totient is φ = 196542720.

The previous prime is 665037029. The next prime is 665037071. The reversal of 665037042 is 240730566.

It is a junction number, because it is equal to n+sod(n) for n = 665036994 and 665037012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155067 + ... + 159297.

It is an arithmetic number, because the mean of its divisors is an integer number (23309856).

Almost surely, 2^665037042 is an apocalyptic number.

665037042 is an abundant number, since it is smaller than the sum of its proper divisors (826793742).

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

665037042 is a wasteful number, since it uses less digits than its factorization.

665037042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 665037042 is about 25788.3121200283. The cubic root of 665037042 is about 872.8680798238.

The spelling of 665037042 in words is "six hundred sixty-five million, thirty-seven thousand, forty-two".