661234141140 has 24 divisors (see below), whose sum is σ = 1851455595360. Its totient is φ = 176329104288.

The previous prime is 661234140877. The next prime is 661234141153. The reversal of 661234141140 is 41141432166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5510284450 + ... + 5510284569.

It is an arithmetic number, because the mean of its divisors is an integer number (77143983140).

Almost surely, 2^661234141140 is an apocalyptic number.

661234141140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

661234141140 is an abundant number, since it is smaller than the sum of its proper divisors (1190221454220).

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

661234141140 is a wasteful number, since it uses less digits than its factorization.

661234141140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11020569031 (or 11020569029 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 661234141140 in words is "six hundred sixty-one billion, two hundred thirty-four million, one hundred forty-one thousand, one hundred forty".