660435051236661 has 48 divisors (see below), whose sum is σ = 956499523499520. Its totient is φ = 439120463876640.

The previous prime is 660435051236651. The next prime is 660435051236713. The reversal of 660435051236661 is 166632150534066.

It is not a de Polignac number, because 660435051236661 - 2⁵ = 660435051236629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660435051236598 and 660435051236607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660435051236651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39257855896 + ... + 39257872718.

It is an arithmetic number, because the mean of its divisors is an integer number (19927073406240).

Almost surely, 2^{660435051236661} is an apocalyptic number.

It is an amenable number.

660435051236661 is a deficient number, since it is larger than the sum of its proper divisors (296064472262859).

660435051236661 is a wasteful number, since it uses less digits than its factorization.

660435051236661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24646 (or 24643 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 54.

The spelling of 660435051236661 in words is "six hundred sixty trillion, four hundred thirty-five billion, fifty-one million, two hundred thirty-six thousand, six hundred sixty-one".