61661727 has 12 divisors (see below), whose sum is σ = 89856624. Its totient is φ = 40743360.

The previous prime is 61661723. The next prime is 61661731. The reversal of 61661727 is 72716616.

61661727 is a `hidden beast` number, since 6 + 16 + 617 + 27 = 666.

It is an interprime number because it is at equal distance from previous prime (61661723) and next prime (61661731).

It is not a de Polignac number, because 61661727 - 2² = 61661723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61661691 and 61661700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61661723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29299 + ... + 31332.

It is an arithmetic number, because the mean of its divisors is an integer number (7488052).

Almost surely, 2^61661727 is an apocalyptic number.

61661727 is a deficient number, since it is larger than the sum of its proper divisors (28194897).

61661727 is a wasteful number, since it uses less digits than its factorization.

61661727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60750 (or 60747 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 61661727 is about 7852.4981375356. The cubic root of 61661727 is about 395.0680372040.

The spelling of 61661727 in words is "sixty-one million, six hundred sixty-one thousand, seven hundred twenty-seven".