660136420513640 has 64 divisors (see below), whose sum is σ = 1708305714345600. Its totient is φ = 224890878820608.

The previous prime is 660136420513631. The next prime is 660136420513657. The reversal of 660136420513640 is 46315024631066.

It is a super-2 number, since 2×660136420513640² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7508332070 + ... + 7508419989.

It is an arithmetic number, because the mean of its divisors is an integer number (26692276786650).

Almost surely, 2^{660136420513640} is an apocalyptic number.

It is an amenable number.

660136420513640 is an abundant number, since it is smaller than the sum of its proper divisors (1048169293831960).

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

660136420513640 is a wasteful number, since it uses less digits than its factorization.

660136420513640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15016752234 (or 15016752230 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 47.

The spelling of 660136420513640 in words is "six hundred sixty trillion, one hundred thirty-six billion, four hundred twenty million, five hundred thirteen thousand, six hundred forty".