9977766 has 8 divisors (see below), whose sum is σ = 19955544. Its totient is φ = 3325920.

The previous prime is 9977743. The next prime is 9977767. The reversal of 9977766 is 6677799.

It is a sphenic number, since it is the product of 3 distinct primes.

9977766 is an admirable number.

It is an Ulam number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831475 + ... + 831486.

It is an arithmetic number, because the mean of its divisors is an integer number (2494443).

Almost surely, 2^9977766 is an apocalyptic number.

9977766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

9977766 is a wasteful number, since it uses less digits than its factorization.

9977766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662966.

The product of its digits is 1000188, while the sum is 51.

The square root of 9977766 is about 3158.7601998252. The cubic root of 9977766 is about 215.2836781820.

The spelling of 9977766 in words is "nine million, nine hundred seventy-seven thousand, seven hundred sixty-six".