61606 has 4 divisors (see below), whose sum is σ = 92412. Its totient is φ = 30802.

The previous prime is 61603. The next prime is 61609. The reversal of 61606 is 60616.

It is a happy number.

61606 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 is an interprime number because it is at equal distance from previous prime (61603) and next prime (61609).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15400 + ... + 15403.

It is an arithmetic number, because the mean of its divisors is an integer number (23103).

2⁶¹⁶⁰⁶ is an apocalyptic number.

61606 is a deficient number, since it is larger than the sum of its proper divisors (30806).

61606 is a wasteful number, since it uses less digits than its factorization.

61606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30805.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 61606 is about 248.2055599700. The cubic root of 61606 is about 39.4948986629.

Subtracting from 61606 its reverse (60616), we obtain a triangular number (990 = T₄₄).

The spelling of 61606 in words is "sixty-one thousand, six hundred six".