61101166505 has 8 divisors (see below), whose sum is σ = 77634423432. Its totient is φ = 46005584128.

The previous prime is 61101166499. The next prime is 61101166517. The reversal of 61101166505 is 50566110116.

It can be written as a sum of positive squares in 4 ways, for example, as 628454761 + 60472711744 = 25069^2 + 245912^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61101166505 - 2²⁶ = 61034057641 is a prime.

It is a Duffinian number.

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, 359418542 + ... + 359418711.

It is an arithmetic number, because the mean of its divisors is an integer number (9704302929).

Almost surely, 2^61101166505 is an apocalyptic number.

It is an amenable number.

61101166505 is a deficient number, since it is larger than the sum of its proper divisors (16533256927).

61101166505 is a wasteful number, since it uses less digits than its factorization.

61101166505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718837275.

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

The spelling of 61101166505 in words is "sixty-one billion, one hundred one million, one hundred sixty-six thousand, five hundred five".