661116696 has 16 divisors (see below), whose sum is σ = 1652791800. Its totient is φ = 220372224.

The previous prime is 661116691. The next prime is 661116697. The reversal of 661116696 is 696611166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661116691) 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 3 ways as a sum of consecutive naturals, for example, 13773241 + ... + 13773288.

Almost surely, 2^661116696 is an apocalyptic number.

It is an amenable number.

661116696 is an abundant number, since it is smaller than the sum of its proper divisors (991675104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661116696 is a wasteful number, since it uses less digits than its factorization.

661116696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27546538 (or 27546534 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 661116696 is about 25712.1896383797. The cubic root of 661116696 is about 871.1495334286.

The spelling of 661116696 in words is "six hundred sixty-one million, one hundred sixteen thousand, six hundred ninety-six".