123071700661 has 32 divisors (see below), whose sum is σ = 159265548288. Its totient is φ = 92430486720.

The previous prime is 123071700641. The next prime is 123071700671. The reversal of 123071700661 is 166007170321.

It is not a de Polignac number, because 123071700661 - 2¹⁹ = 123071176373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123071700601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49750 + ... + 498616.

It is an arithmetic number, because the mean of its divisors is an integer number (4977048384).

Almost surely, 2^123071700661 is an apocalyptic number.

It is an amenable number.

123071700661 is a deficient number, since it is larger than the sum of its proper divisors (36193847627).

123071700661 is a wasteful number, since it uses less digits than its factorization.

123071700661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449041.

The product of its (nonzero) digits is 10584, while the sum is 34.

Adding to 123071700661 its reverse (166007170321), we get a palindrome (289078870982).

The spelling of 123071700661 in words is "one hundred twenty-three billion, seventy-one million, seven hundred thousand, six hundred sixty-one".