61606106605 has 8 divisors (see below), whose sum is σ = 74757972600. Its totient is φ = 48731122176.

The previous prime is 61606106561. The next prime is 61606106657. The reversal of 61606106605 is 50660160616.

It can be written as a sum of positive squares in 4 ways, for example, as 13235582116 + 48370524489 = 115046^2 + 219933^2 .

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 61606106605 - 2²⁹ = 61069235693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69219900 + ... + 69220789.

It is an arithmetic number, because the mean of its divisors is an integer number (9344746575).

Almost surely, 2^61606106605 is an apocalyptic number.

It is an amenable number.

61606106605 is a deficient number, since it is larger than the sum of its proper divisors (13151865995).

61606106605 is a wasteful number, since it uses less digits than its factorization.

61606106605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138440783.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 61606106605 in words is "sixty-one billion, six hundred six million, one hundred six thousand, six hundred five".