665156466042 has 8 divisors (see below), whose sum is σ = 1330312932096. Its totient is φ = 221718822012.

The previous prime is 665156465993. The next prime is 665156466067. The reversal of 665156466042 is 240664651566.

It is a sphenic number, since it is the product of 3 distinct primes.

665156466042 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55429705498 + ... + 55429705509.

It is an arithmetic number, because the mean of its divisors is an integer number (166289116512).

Almost surely, 2^665156466042 is an apocalyptic number.

665156466042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

665156466042 is a wasteful number, since it uses less digits than its factorization.

665156466042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110859411012.

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 665156466042 in words is "six hundred sixty-five billion, one hundred fifty-six million, four hundred sixty-six thousand, forty-two".