61066660 has 12 divisors (see below), whose sum is σ = 128240028. Its totient is φ = 24426656.

The previous prime is 61066657. The next prime is 61066661. The reversal of 61066660 is 6666016.

It can be written as a sum of positive squares in 2 ways, for example, as 44809636 + 16257024 = 6694^2 + 4032^2 .

It is not an unprimeable number, because it can be changed into a prime (61066661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1526647 + ... + 1526686.

It is an arithmetic number, because the mean of its divisors is an integer number (10686669).

Almost surely, 2^61066660 is an apocalyptic number.

It is an amenable number.

61066660 is an abundant number, since it is smaller than the sum of its proper divisors (67173368).

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

61066660 is a wasteful number, since it uses less digits than its factorization.

61066660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053342 (or 3053340 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 61066660 is about 7814.5159798928. The cubic root of 61066660 is about 393.7930578595.

The spelling of 61066660 in words is "sixty-one million, sixty-six thousand, six hundred sixty".