61905668 has 12 divisors (see below), whose sum is σ = 118183632. Its totient is φ = 28138920.

The previous prime is 61905661. The next prime is 61905671. The reversal of 61905668 is 86650916.

It is not an unprimeable number, because it can be changed into a prime (61905661) 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 3 ways as a sum of consecutive naturals, for example, 703430 + ... + 703517.

It is an arithmetic number, because the mean of its divisors is an integer number (9848636).

Almost surely, 2^61905668 is an apocalyptic number.

It is an amenable number.

61905668 is a deficient number, since it is larger than the sum of its proper divisors (56277964).

61905668 is a wasteful number, since it uses less digits than its factorization.

61905668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406962 (or 1406960 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 61905668 is about 7868.0155058312. The cubic root of 61905668 is about 395.5883301384.

The spelling of 61905668 in words is "sixty-one million, nine hundred five thousand, six hundred sixty-eight".