661335061052 has 6 divisors (see below), whose sum is σ = 1157336356848. Its totient is φ = 330667530524.

The previous prime is 661335061043. The next prime is 661335061067. The reversal of 661335061052 is 250160533166.

661335061052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 661335060997 and 661335061015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82666882628 + ... + 82666882635.

It is an arithmetic number, because the mean of its divisors is an integer number (192889392808).

Almost surely, 2^661335061052 is an apocalyptic number.

It is an amenable number.

661335061052 is a deficient number, since it is larger than the sum of its proper divisors (496001295796).

661335061052 is a wasteful number, since it uses less digits than its factorization.

661335061052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165333765267 (or 165333765265 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 661335061052 in words is "six hundred sixty-one billion, three hundred thirty-five million, sixty-one thousand, fifty-two".