61606540 has 24 divisors (see below), whose sum is σ = 129654000. Its totient is φ = 24589248.

The previous prime is 61606529. The next prime is 61606541. The reversal of 61606540 is 4560616.

It is a junction number, because it is equal to n+sod(n) for n = 61606499 and 61606508.

It is not an unprimeable number, because it can be changed into a prime (61606541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6894 + ... + 13066.

It is an arithmetic number, because the mean of its divisors is an integer number (5402250).

Almost surely, 2^61606540 is an apocalyptic number.

It is an amenable number.

61606540 is an abundant number, since it is smaller than the sum of its proper divisors (68047460).

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

61606540 is a wasteful number, since it uses less digits than its factorization.

61606540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6681 (or 6679 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 61606540 is about 7848.9833736606. The cubic root of 61606540 is about 394.9501405849.

The spelling of 61606540 in words is "sixty-one million, six hundred six thousand, five hundred forty".