997574066 has 4 divisors (see below), whose sum is σ = 1496361102. Its totient is φ = 498787032.

The previous prime is 997574063. The next prime is 997574077. The reversal of 997574066 is 660475799.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 925680625 + 71893441 = 30425^2 + 8479^2 .

It is a junction number, because it is equal to n+sod(n) for n = 997573999 and 997574017.

It is not an unprimeable number, because it can be changed into a prime (997574063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249393515 + ... + 249393518.

Almost surely, 2^997574066 is an apocalyptic number.

997574066 is a deficient number, since it is larger than the sum of its proper divisors (498787036).

997574066 is a wasteful number, since it uses less digits than its factorization.

997574066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498787035.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The square root of 997574066 is about 31584.3959258365. The cubic root of 997574066 is about 999.1907005444.

It can be divided in two parts, 99757 and 4066, that added together give a cube (103823 = 47³).

The spelling of 997574066 in words is "nine hundred ninety-seven million, five hundred seventy-four thousand, sixty-six".