661126008 has 16 divisors (see below), whose sum is σ = 1652815080. Its totient is φ = 220375328.

The previous prime is 661126001. The next prime is 661126013. The reversal of 661126008 is 800621166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661126001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13773435 + ... + 13773482.

Almost surely, 2^661126008 is an apocalyptic number.

It is an amenable number.

661126008 is an abundant number, since it is smaller than the sum of its proper divisors (991689072).

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

661126008 is a wasteful number, since it uses less digits than its factorization.

661126008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27546926 (or 27546922 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 661126008 is about 25712.3707191694. The cubic root of 661126008 is about 871.1536235317.

The spelling of 661126008 in words is "six hundred sixty-one million, one hundred twenty-six thousand, eight".