997748066 has 8 divisors (see below), whose sum is σ = 1710425280. Its totient is φ = 427606308.

The previous prime is 997748057. The next prime is 997748093. The reversal of 997748066 is 660847799.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35633846 + ... + 35633873.

It is an arithmetic number, because the mean of its divisors is an integer number (213803160).

Almost surely, 2^997748066 is an apocalyptic number.

997748066 is a deficient number, since it is larger than the sum of its proper divisors (712677214).

997748066 is a wasteful number, since it uses less digits than its factorization.

997748066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71267728.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The square root of 997748066 is about 31587.1503304746. The cubic root of 997748066 is about 999.2487911599.

The spelling of 997748066 in words is "nine hundred ninety-seven million, seven hundred forty-eight thousand, sixty-six".