61680906 has 48 divisors (see below), whose sum is σ = 159454080. Its totient is φ = 17622360.

The previous prime is 61680889. The next prime is 61680907. The reversal of 61680906 is 60908616.

61680906 is nontrivially palindromic in base 5.

61680906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61680907) 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 23 ways as a sum of consecutive naturals, for example, 9010 + ... + 14301.

It is an arithmetic number, because the mean of its divisors is an integer number (3321960).

Almost surely, 2^61680906 is an apocalyptic number.

61680906 is an abundant number, since it is smaller than the sum of its proper divisors (97773174).

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

61680906 is a wasteful number, since it uses less digits than its factorization.

61680906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23336 (or 23323 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 61680906 is about 7853.7192463189. The cubic root of 61680906 is about 395.1089930492.

The spelling of 61680906 in words is "sixty-one million, six hundred eighty thousand, nine hundred six".