61204660 has 96 divisors (see below), whose sum is σ = 147393792. Its totient is φ = 21150720.

The previous prime is 61204621. The next prime is 61204711. The reversal of 61204660 is 6640216.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 594169 + ... + 594271.

It is an arithmetic number, because the mean of its divisors is an integer number (1535352).

Almost surely, 2^61204660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61204660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73696896).

61204660 is an abundant number, since it is smaller than the sum of its proper divisors (86189132).

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

61204660 is a wasteful number, since it uses less digits than its factorization.

61204660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 61204660 is about 7823.3407186444. The cubic root of 61204660 is about 394.0894692332.

Adding to 61204660 its reverse (6640216), we get a palindrome (67844876).

The spelling of 61204660 in words is "sixty-one million, two hundred four thousand, six hundred sixty".