990666770 has 8 divisors (see below), whose sum is σ = 1783200204. Its totient is φ = 396266704.

The previous prime is 990666769. The next prime is 990666791. The reversal of 990666770 is 77666099.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 929091361 + 61575409 = 30481^2 + 7847^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49533329 + ... + 49533348.

Almost surely, 2^990666770 is an apocalyptic number.

990666770 is a deficient number, since it is larger than the sum of its proper divisors (792533434).

990666770 is a wasteful number, since it uses less digits than its factorization.

990666770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99066684.

The product of its (nonzero) digits is 857304, while the sum is 50.

The square root of 990666770 is about 31474.8593324895. The cubic root of 990666770 is about 996.8791940351.

The spelling of 990666770 in words is "nine hundred ninety million, six hundred sixty-six thousand, seven hundred seventy".