610106661 has 28 divisors (see below), whose sum is σ = 936062688. Its totient is φ = 397258344.

The previous prime is 610106657. The next prime is 610106687. The reversal of 610106661 is 166601016.

It is not a de Polignac number, because 610106661 - 2² = 610106657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610106261) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 21616 + ... + 41078.

Almost surely, 2^610106661 is an apocalyptic number.

It is an amenable number.

610106661 is a deficient number, since it is larger than the sum of its proper divisors (325956027).

610106661 is an equidigital number, since it uses as much as digits as its factorization.

610106661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19524 (or 19509 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 610106661 is about 24700.3372649039. The cubic root of 610106661 is about 848.1420367908.

Adding to 610106661 its reverse (166601016), we get a palindrome (776707677).

The spelling of 610106661 in words is "six hundred ten million, one hundred six thousand, six hundred sixty-one".