61141660 has 48 divisors (see below), whose sum is σ = 132596352. Its totient is φ = 23667200.

The previous prime is 61141651. The next prime is 61141669. The reversal of 61141660 is 6614116.

It is an interprime number because it is at equal distance from previous prime (61141651) and next prime (61141669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61141669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141645 + ... + 142075.

It is an arithmetic number, because the mean of its divisors is an integer number (2762424).

Almost surely, 2^61141660 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 61141660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66298176).

61141660 is an abundant number, since it is smaller than the sum of its proper divisors (71454692).

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

61141660 is a wasteful number, since it uses less digits than its factorization.

61141660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 61141660 is about 7819.3132690793. The cubic root of 61141660 is about 393.9542063297.

Adding to 61141660 its reverse (6614116), we get a palindrome (67755776).

The spelling of 61141660 in words is "sixty-one million, one hundred forty-one thousand, six hundred sixty".