661652366461460 has 24 divisors (see below), whose sum is σ = 1515785421348576. Its totient is φ = 240600860531360.

The previous prime is 661652366461447. The next prime is 661652366461613. The reversal of 661652366461460 is 64164663256166.

It is a junction number, because it is equal to n+sod(n) for n = 661652366461393 and 661652366461402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1503755378102 + ... + 1503755378541.

It is an arithmetic number, because the mean of its divisors is an integer number (63157725889524).

Almost surely, 2^{661652366461460} is an apocalyptic number.

It is an amenable number.

661652366461460 is an abundant number, since it is smaller than the sum of its proper divisors (854133054887116).

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

661652366461460 is a wasteful number, since it uses less digits than its factorization.

661652366461460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3007510756663 (or 3007510756661 counting only the distinct ones).

The product of its (nonzero) digits is 134369280, while the sum is 62.

The spelling of 661652366461460 in words is "six hundred sixty-one trillion, six hundred fifty-two billion, three hundred sixty-six million, four hundred sixty-one thousand, four hundred sixty".