665660105010 has 48 divisors (see below), whose sum is σ = 1731143822616. Its totient is φ = 177465510144.

The previous prime is 665660104943. The next prime is 665660105021. The reversal of 665660105010 is 10501066566.

It can be written as a sum of positive squares in 4 ways, for example, as 502671074049 + 162989030961 = 708993^2 + 403719^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 546409 + ... + 1276668.

Almost surely, 2^665660105010 is an apocalyptic number.

665660105010 is an abundant number, since it is smaller than the sum of its proper divisors (1065483717606).

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

665660105010 is a wasteful number, since it uses less digits than its factorization.

665660105010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827147 (or 1827144 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 665660105010 in words is "six hundred sixty-five billion, six hundred sixty million, one hundred five thousand, ten".