988761566 has 16 divisors (see below), whose sum is σ = 1623416928. Its totient is φ = 448869600.

The previous prime is 988761547. The next prime is 988761569. The reversal of 988761566 is 665167889.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988761569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310130 + ... + 313301.

It is an arithmetic number, because the mean of its divisors is an integer number (101463558).

Almost surely, 2^988761566 is an apocalyptic number.

988761566 is a deficient number, since it is larger than the sum of its proper divisors (634655362).

988761566 is a wasteful number, since it uses less digits than its factorization.

988761566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623507.

The product of its digits is 4354560, while the sum is 56.

The square root of 988761566 is about 31444.5792784702. The cubic root of 988761566 is about 996.2397334517.

The spelling of 988761566 in words is "nine hundred eighty-eight million, seven hundred sixty-one thousand, five hundred sixty-six".