990225766 has 4 divisors (see below), whose sum is σ = 1485338652. Its totient is φ = 495112882.

The previous prime is 990225757. The next prime is 990225767. The reversal of 990225766 is 667522099.

990225766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 667522099 = 3191 ⋅209189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990225767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247556440 + ... + 247556443.

It is an arithmetic number, because the mean of its divisors is an integer number (371334663).

Almost surely, 2^990225766 is an apocalyptic number.

990225766 is a deficient number, since it is larger than the sum of its proper divisors (495112886).

990225766 is a wasteful number, since it uses less digits than its factorization.

990225766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495112885.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 990225766 is about 31467.8528978385. The cubic root of 990225766 is about 996.7312489082.

The spelling of 990225766 in words is "nine hundred ninety million, two hundred twenty-five thousand, seven hundred sixty-six".