61995680 has 48 divisors (see below), whose sum is σ = 149887584. Its totient is φ = 24218880.

The previous prime is 61995677. The next prime is 61995701. The reversal of 61995680 is 8659916.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2375 + ... + 11385.

It is an arithmetic number, because the mean of its divisors is an integer number (3122658).

Almost surely, 2^61995680 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 61995680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74943792).

61995680 is an abundant number, since it is smaller than the sum of its proper divisors (87891904).

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

61995680 is a wasteful number, since it uses less digits than its factorization.

61995680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9069 (or 9061 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 61995680 is about 7873.7335489588. The cubic root of 61995680 is about 395.7799682321.

The spelling of 61995680 in words is "sixty-one million, nine hundred ninety-five thousand, six hundred eighty".