61661070611660 has 48 divisors (see below), whose sum is σ = 139471780600992. Its totient is φ = 22763426112000.

The previous prime is 61661070611639. The next prime is 61661070611677. The reversal of 61661070611660 is 6611607016616.

It is a super-2 number, since 2×61661070611660² (a number of 28 digits) contains 22 as substring.

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, 17884241 + ... + 21051560.

It is an arithmetic number, because the mean of its divisors is an integer number (2905662095854).

Almost surely, 2^{61661070611660} is an apocalyptic number.

It is an amenable number.

61661070611660 is an abundant number, since it is smaller than the sum of its proper divisors (77810709989332).

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

61661070611660 is a wasteful number, since it uses less digits than its factorization.

61661070611660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38941914 (or 38941912 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 61661070611660 in words is "sixty-one trillion, six hundred sixty-one billion, seventy million, six hundred eleven thousand, six hundred sixty".