61072705 has 16 divisors (see below), whose sum is σ = 77001984. Its totient is φ = 46411200.

The previous prime is 61072703. The next prime is 61072733. The reversal of 61072705 is 50727016.

61072705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61072705 - 2¹ = 61072703 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61072703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15607 + ... + 19123.

It is an arithmetic number, because the mean of its divisors is an integer number (4812624).

Almost surely, 2^61072705 is an apocalyptic number.

It is an amenable number.

61072705 is a deficient number, since it is larger than the sum of its proper divisors (15929279).

61072705 is a wasteful number, since it uses less digits than its factorization.

61072705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 61072705 is about 7814.9027505146. The cubic root of 61072705 is about 393.8060513134.

The spelling of 61072705 in words is "sixty-one million, seventy-two thousand, seven hundred five".