61011101660 has 12 divisors (see below), whose sum is σ = 128123313528. Its totient is φ = 24404440656.

The previous prime is 61011101659. The next prime is 61011101687. The reversal of 61011101660 is 6610111016.

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 3 ways as a sum of consecutive naturals, for example, 1525277522 + ... + 1525277561.

It is an arithmetic number, because the mean of its divisors is an integer number (10676942794).

Almost surely, 2^61011101660 is an apocalyptic number.

It is an amenable number.

61011101660 is an abundant number, since it is smaller than the sum of its proper divisors (67112211868).

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

61011101660 is a wasteful number, since it uses less digits than its factorization.

61011101660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3050555092 (or 3050555090 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 23.

Adding to 61011101660 its reverse (6610111016), we get a palindrome (67621212676).

The spelling of 61011101660 in words is "sixty-one billion, eleven million, one hundred one thousand, six hundred sixty".