661146424060 has 12 divisors (see below), whose sum is σ = 1388407490568. Its totient is φ = 264458569616.

The previous prime is 661146424013. The next prime is 661146424111. The reversal of 661146424060 is 60424641166.

It is a super-2 number, since 2×661146424060² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16528660582 + ... + 16528660621.

It is an arithmetic number, because the mean of its divisors is an integer number (115700624214).

Almost surely, 2^661146424060 is an apocalyptic number.

It is an amenable number.

661146424060 is an abundant number, since it is smaller than the sum of its proper divisors (727261066508).

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

661146424060 is a wasteful number, since it uses less digits than its factorization.

661146424060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33057321212 (or 33057321210 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 661146424060 in words is "six hundred sixty-one billion, one hundred forty-six million, four hundred twenty-four thousand, sixty".