61616166 has 16 divisors (see below), whose sum is σ = 123704064. Its totient is φ = 20460104.

The previous prime is 61616141. The next prime is 61616167. The reversal of 61616166 is 66161616.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61616167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17946 + ... + 21101.

It is an arithmetic number, because the mean of its divisors is an integer number (7731504).

Almost surely, 2^61616166 is an apocalyptic number.

61616166 is an abundant number, since it is smaller than the sum of its proper divisors (62087898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61616166 is a wasteful number, since it uses less digits than its factorization.

61616166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39315.

The product of its digits is 7776, while the sum is 33.

The square root of 61616166 is about 7849.5965501419. The cubic root of 61616166 is about 394.9707097867.

It can be divided in two parts, 6 and 1616166, that multiplied together give a square (9696996 = 3114²).

The spelling of 61616166 in words is "sixty-one million, six hundred sixteen thousand, one hundred sixty-six".