661120622 has 12 divisors (see below), whose sum is σ = 1010753520. Its totient is φ = 324320568.

The previous prime is 661120619. The next prime is 661120673. The reversal of 661120622 is 226021166.

It is a junction number, because it is equal to n+sod(n) for n = 661120591 and 661120600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53222 + ... + 64457.

It is an arithmetic number, because the mean of its divisors is an integer number (84229460).

Almost surely, 2^661120622 is an apocalyptic number.

661120622 is a deficient number, since it is larger than the sum of its proper divisors (349632898).

661120622 is a wasteful number, since it uses less digits than its factorization.

661120622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117787 (or 117734 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 661120622 is about 25712.2659833784. The cubic root of 661120622 is about 871.1512578474.

Adding to 661120622 its reverse (226021166), we get a palindrome (887141788).

The spelling of 661120622 in words is "six hundred sixty-one million, one hundred twenty thousand, six hundred twenty-two".