97281666 has 12 divisors (see below), whose sum is σ = 210776982. Its totient is φ = 32427216.

The previous prime is 97281647. The next prime is 97281673. The reversal of 97281666 is 66618279.

It can be written as a sum of positive squares in only one way, i.e., 86881041 + 10400625 = 9321^2 + 3225^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2702251 + ... + 2702286.

Almost surely, 2^97281666 is an apocalyptic number.

97281666 is an abundant number, since it is smaller than the sum of its proper divisors (113495316).

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

97281666 is a wasteful number, since it uses less digits than its factorization.

97281666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5404545 (or 5404542 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 97281666 is about 9863.1468609161. The cubic root of 97281666 is about 459.9143917563.

The spelling of 97281666 in words is "ninety-seven million, two hundred eighty-one thousand, six hundred sixty-six".