61440566 has 16 divisors (see below), whose sum is σ = 105831360. Its totient is φ = 26457480.

The previous prime is 61440559. The next prime is 61440581. The reversal of 61440566 is 66504416.

It is a congruent number.

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, 73076 + ... + 73911.

It is an arithmetic number, because the mean of its divisors is an integer number (6614460).

Almost surely, 2^61440566 is an apocalyptic number.

61440566 is a deficient number, since it is larger than the sum of its proper divisors (44390794).

61440566 is a wasteful number, since it uses less digits than its factorization.

61440566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147019.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 61440566 is about 7838.4032812812. The cubic root of 61440566 is about 394.5951435871.

The spelling of 61440566 in words is "sixty-one million, four hundred forty thousand, five hundred sixty-six".