661125510142 has 16 divisors (see below), whose sum is σ = 995106949200. Its totient is φ = 329424133248.

The previous prime is 661125510121. The next prime is 661125510151. The reversal of 661125510142 is 241015521166.

It is a junction number, because it is equal to n+sod(n) for n = 661125510098 and 661125510107.

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, 1181068 + ... + 1648384.

It is an arithmetic number, because the mean of its divisors is an integer number (62194184325).

Almost surely, 2^661125510142 is an apocalyptic number.

661125510142 is a deficient number, since it is larger than the sum of its proper divisors (333981439058).

661125510142 is a wasteful number, since it uses less digits than its factorization.

661125510142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469755.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 661125510142 in words is "six hundred sixty-one billion, one hundred twenty-five million, five hundred ten thousand, one hundred forty-two".