610666601565 has 16 divisors (see below), whose sum is σ = 1003473767808. Its totient is φ = 316886452416.

The previous prime is 610666601557. The next prime is 610666601581. The reversal of 610666601565 is 565106666016.

610666601565 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 610666601565 - 2³ = 610666601557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550149537 + ... + 550150646.

It is an arithmetic number, because the mean of its divisors is an integer number (62717110488).

Almost surely, 2^610666601565 is an apocalyptic number.

It is an amenable number.

610666601565 is a deficient number, since it is larger than the sum of its proper divisors (392807166243).

610666601565 is a wasteful number, since it uses less digits than its factorization.

610666601565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100300228.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 610666601565 in words is "six hundred ten billion, six hundred sixty-six million, six hundred one thousand, five hundred sixty-five".