661355253114 has 32 divisors (see below), whose sum is σ = 1325679823104. Its totient is φ = 219957292800.

The previous prime is 661355253107. The next prime is 661355253131. The reversal of 661355253114 is 411352553166.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6269007 + ... + 6373629.

It is an arithmetic number, because the mean of its divisors is an integer number (41427494472).

Almost surely, 2^661355253114 is an apocalyptic number.

661355253114 is an abundant number, since it is smaller than the sum of its proper divisors (664324569990).

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

661355253114 is a wasteful number, since it uses less digits than its factorization.

661355253114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106982.

The product of its digits is 324000, while the sum is 42.

It can be divided in two parts, 6613552 and 53114, that added together give a palindrome (6666666).

The spelling of 661355253114 in words is "six hundred sixty-one billion, three hundred fifty-five million, two hundred fifty-three thousand, one hundred fourteen".