61072660 has 24 divisors (see below), whose sum is σ = 139912416. Its totient is φ = 22208160.

The previous prime is 61072643. The next prime is 61072663. The reversal of 61072660 is 6627016.

61072660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61072663) 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, 138582 + ... + 139021.

It is an arithmetic number, because the mean of its divisors is an integer number (5829684).

Almost surely, 2^61072660 is an apocalyptic number.

It is an amenable number.

61072660 is an abundant number, since it is smaller than the sum of its proper divisors (78839756).

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

61072660 is a wasteful number, since it uses less digits than its factorization.

61072660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277623 (or 277621 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 61072660 is about 7814.8998713995. The cubic root of 61072660 is about 393.8059545911.

Adding to 61072660 its reverse (6627016), we get a palindrome (67699676).

The spelling of 61072660 in words is "sixty-one million, seventy-two thousand, six hundred sixty".