661140355130 has 16 divisors (see below), whose sum is σ = 1228441434624. Its totient is φ = 255925298640.

The previous prime is 661140355121. The next prime is 661140355157. The reversal of 661140355130 is 31553041166.

661140355130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1066355102 + ... + 1066355721.

It is an arithmetic number, because the mean of its divisors is an integer number (76777589664).

Almost surely, 2^661140355130 is an apocalyptic number.

661140355130 is a deficient number, since it is larger than the sum of its proper divisors (567301079494).

661140355130 is a wasteful number, since it uses less digits than its factorization.

661140355130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132710861.

The product of its (nonzero) digits is 32400, while the sum is 35.

Adding to 661140355130 its reverse (31553041166), we get a palindrome (692693396296).

The spelling of 661140355130 in words is "six hundred sixty-one billion, one hundred forty million, three hundred fifty-five thousand, one hundred thirty".