9661977 has 16 divisors (see below), whose sum is σ = 15415680. Its totient is φ = 5945616.

The previous prime is 9661969. The next prime is 9661979. The reversal of 9661977 is 7791669.

9661977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9661977 - 2³ = 9661969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9661979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13413 + ... + 14114.

It is an arithmetic number, because the mean of its divisors is an integer number (963480).

Almost surely, 2^9661977 is an apocalyptic number.

It is an amenable number.

9661977 is a deficient number, since it is larger than the sum of its proper divisors (5753703).

9661977 is a wasteful number, since it uses less digits than its factorization.

9661977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27549 (or 27543 counting only the distinct ones).

The product of its digits is 142884, while the sum is 45.

The square root of 9661977 is about 3108.3720819747. The cubic root of 9661977 is about 212.9880969345.

The spelling of 9661977 in words is "nine million, six hundred sixty-one thousand, nine hundred seventy-seven".