9775666 has 4 divisors (see below), whose sum is σ = 14663502. Its totient is φ = 4887832.

The previous prime is 9775637. The next prime is 9775673. The reversal of 9775666 is 6665779.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6665779 = 107 ⋅62297.

It can be written as a sum of positive squares in only one way, i.e., 6275025 + 3500641 = 2505^2 + 1871^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2443915 + ... + 2443918.

Almost surely, 2^9775666 is an apocalyptic number.

9775666 is a deficient number, since it is larger than the sum of its proper divisors (4887836).

9775666 is a wasteful number, since it uses less digits than its factorization.

9775666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4887835.

The product of its digits is 476280, while the sum is 46.

The square root of 9775666 is about 3126.6061472466. The cubic root of 9775666 is about 213.8202263465.

The spelling of 9775666 in words is "nine million, seven hundred seventy-five thousand, six hundred sixty-six".