61214660 has 24 divisors (see below), whose sum is σ = 138439896. Its totient is φ = 22602240.

The previous prime is 61214641. The next prime is 61214669. The reversal of 61214660 is 6641216.

It is a happy number.

61214660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8099716 + 53114944 = 2846^2 + 7288^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (61214669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117461 + ... + 117980.

It is an arithmetic number, because the mean of its divisors is an integer number (5768329).

Almost surely, 2^61214660 is an apocalyptic number.

It is an amenable number.

61214660 is an abundant number, since it is smaller than the sum of its proper divisors (77225236).

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

61214660 is a wasteful number, since it uses less digits than its factorization.

61214660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235463 (or 235461 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 61214660 is about 7823.9798056999. The cubic root of 61214660 is about 394.1109309982.

Adding to 61214660 its reverse (6641216), we get a palindrome (67855876).

The spelling of 61214660 in words is "sixty-one million, two hundred fourteen thousand, six hundred sixty".