611106661 has 16 divisors (see below), whose sum is σ = 675148608. Its totient is φ = 548512000.

The previous prime is 611106659. The next prime is 611106703. The reversal of 611106661 is 166601116.

It is a cyclic number.

It is not a de Polignac number, because 611106661 - 2¹ = 611106659 is a prime.

It is a super-2 number, since 2×611106661² = 746902702237137842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611106611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 625005 + ... + 625981.

It is an arithmetic number, because the mean of its divisors is an integer number (42196788).

Almost surely, 2^611106661 is an apocalyptic number.

It is an amenable number.

611106661 is a deficient number, since it is larger than the sum of its proper divisors (64041947).

611106661 is a wasteful number, since it uses less digits than its factorization.

611106661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 611106661 is about 24720.5716155594. The cubic root of 611106661 is about 848.6051684190.

Adding to 611106661 its reverse (166601116), we get a palindrome (777707777).

The spelling of 611106661 in words is "six hundred eleven million, one hundred six thousand, six hundred sixty-one".