610661505 has 64 divisors (see below), whose sum is σ = 1081486080. Its totient is φ = 292921344.

The previous prime is 610661483. The next prime is 610661507. The reversal of 610661505 is 505166016.

It is not a de Polignac number, because 610661505 - 2⁷ = 610661377 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (610661507) 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 63 ways as a sum of consecutive naturals, for example, 556117 + ... + 557213.

It is an arithmetic number, because the mean of its divisors is an integer number (16898220).

Almost surely, 2^610661505 is an apocalyptic number.

It is an amenable number.

610661505 is a deficient number, since it is larger than the sum of its proper divisors (470824575).

610661505 is a wasteful number, since it uses less digits than its factorization.

610661505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 610661505 is about 24711.5662190805. The cubic root of 610661505 is about 848.3990650388.

The spelling of 610661505 in words is "six hundred ten million, six hundred sixty-one thousand, five hundred five".