61565606 has 4 divisors (see below), whose sum is σ = 92348412. Its totient is φ = 30782802.

The previous prime is 61565593. The next prime is 61565611. The reversal of 61565606 is 60656516.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15391400 + ... + 15391403.

It is an arithmetic number, because the mean of its divisors is an integer number (23087103).

Almost surely, 2^61565606 is an apocalyptic number.

61565606 is a deficient number, since it is larger than the sum of its proper divisors (30782806).

61565606 is a wasteful number, since it uses less digits than its factorization.

61565606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30782805.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 61565606 is about 7846.3753415192. The cubic root of 61565606 is about 394.8626473250.

The spelling of 61565606 in words is "sixty-one million, five hundred sixty-five thousand, six hundred six".