61806673 has 4 divisors (see below), whose sum is σ = 62501220. Its totient is φ = 61112128.

The previous prime is 61806671. The next prime is 61806683. The reversal of 61806673 is 37660816.

61806673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22581504 + 39225169 = 4752^2 + 6263^2 .

It is a cyclic number.

It is not a de Polignac number, because 61806673 - 2¹ = 61806671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61806671) 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 3 ways as a sum of consecutive naturals, for example, 347140 + ... + 347317.

It is an arithmetic number, because the mean of its divisors is an integer number (15625305).

Almost surely, 2^61806673 is an apocalyptic number.

It is an amenable number.

61806673 is a deficient number, since it is larger than the sum of its proper divisors (694547).

61806673 is an equidigital number, since it uses as much as digits as its factorization.

61806673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694546.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 61806673 is about 7861.7220123838. The cubic root of 61806673 is about 395.3773523654.

The spelling of 61806673 in words is "sixty-one million, eight hundred six thousand, six hundred seventy-three".