665151555016 has 16 divisors (see below), whose sum is σ = 1343094486300. Its totient is φ = 306993025344.

The previous prime is 665151554999. The next prime is 665151555041. The reversal of 665151555016 is 610555151566.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 656984818116 + 8166736900 = 810546^2 + 90370^2 .

It is a super-2 number, since 2×665151555016² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3197843911 + ... + 3197844118.

Almost surely, 2^665151555016 is an apocalyptic number.

It is an amenable number.

665151555016 is an abundant number, since it is smaller than the sum of its proper divisors (677942931284).

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

665151555016 is a wasteful number, since it uses less digits than its factorization.

665151555016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6395688048 (or 6395688044 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 665151555016 in words is "six hundred sixty-five billion, one hundred fifty-one million, five hundred fifty-five thousand, sixteen".