61066866 has 64 divisors (see below), whose sum is σ = 145716480. Its totient is φ = 16692480.

The previous prime is 61066861. The next prime is 61066867. The reversal of 61066866 is 66866016.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61066861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220320 + ... + 220596.

It is an arithmetic number, because the mean of its divisors is an integer number (2276820).

Almost surely, 2^61066866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61066866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72858240).

61066866 is an abundant number, since it is smaller than the sum of its proper divisors (84649614).

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

61066866 is a wasteful number, since it uses less digits than its factorization.

61066866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 61066866 is about 7814.5291604805. The cubic root of 61066866 is about 393.7935006613.

It can be divided in two parts, 610 and 66866, that added together give a palindrome (67476).

The spelling of 61066866 in words is "sixty-one million, sixty-six thousand, eight hundred sixty-six".