397332666 has 12 divisors (see below), whose sum is σ = 860887482. Its totient is φ = 132444216.

The previous prime is 397332647. The next prime is 397332701. The reversal of 397332666 is 666233793.

It can be written as a sum of positive squares in only one way, i.e., 215649225 + 181683441 = 14685^2 + 13479^2 .

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 5 ways as a sum of consecutive naturals, for example, 11037001 + ... + 11037036.

Almost surely, 2^397332666 is an apocalyptic number.

397332666 is an abundant number, since it is smaller than the sum of its proper divisors (463554816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397332666 is a wasteful number, since it uses less digits than its factorization.

397332666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22074045 (or 22074042 counting only the distinct ones).

The product of its digits is 734832, while the sum is 45.

The square root of 397332666 is about 19933.2051110703. The cubic root of 397332666 is about 735.1648887318.

The spelling of 397332666 in words is "three hundred ninety-seven million, three hundred thirty-two thousand, six hundred sixty-six".