661550161010 has 32 divisors (see below), whose sum is σ = 1197809145792. Its totient is φ = 263060666560.

The previous prime is 661550160919. The next prime is 661550161039. The reversal of 661550161010 is 10161055166.

661550161010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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, 21344825 + ... + 21375795.

It is an arithmetic number, because the mean of its divisors is an integer number (37431535806).

Almost surely, 2^661550161010 is an apocalyptic number.

661550161010 is a deficient number, since it is larger than the sum of its proper divisors (536258984782).

661550161010 is a wasteful number, since it uses less digits than its factorization.

661550161010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43498.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 661550161010 in words is "six hundred sixty-one billion, five hundred fifty million, one hundred sixty-one thousand, ten".