97509966 has 8 divisors (see below), whose sum is σ = 195019944. Its totient is φ = 32503320.

The previous prime is 97509959. The next prime is 97509989. The reversal of 97509966 is 66990579.

It is a sphenic number, since it is the product of 3 distinct primes.

97509966 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8125825 + ... + 8125836.

It is an arithmetic number, because the mean of its divisors is an integer number (24377493).

Almost surely, 2^97509966 is an apocalyptic number.

97509966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

97509966 is a wasteful number, since it uses less digits than its factorization.

97509966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16251666.

The product of its (nonzero) digits is 918540, while the sum is 51.

The square root of 97509966 is about 9874.7134641973. The cubic root of 97509966 is about 460.2738854146.

The spelling of 97509966 in words is "ninety-seven million, five hundred nine thousand, nine hundred sixty-six".