660136420513654 has 32 divisors (see below), whose sum is σ = 1200421363875840. Its totient is φ = 265786725230208.

The previous prime is 660136420513631. The next prime is 660136420513657. The reversal of 660136420513654 is 456315024631066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660136420513657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2535228534 + ... + 2535488905.

It is an arithmetic number, because the mean of its divisors is an integer number (37513167621120).

Almost surely, 2^{660136420513654} is an apocalyptic number.

660136420513654 is a deficient number, since it is larger than the sum of its proper divisors (540284943362186).

660136420513654 is a wasteful number, since it uses less digits than its factorization.

660136420513654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5070718012.

The product of its (nonzero) digits is 9331200, while the sum is 52.

The spelling of 660136420513654 in words is "six hundred sixty trillion, one hundred thirty-six billion, four hundred twenty million, five hundred thirteen thousand, six hundred fifty-four".