97666725766 has 8 divisors (see below), whose sum is σ = 147869248680. Its totient is φ = 48376976208.

The previous prime is 97666725743. The next prime is 97666725787. The reversal of 97666725766 is 66752766679.

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

It is a super-3 number, since 3×97666725766³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228193071 + ... + 228193498.

It is an arithmetic number, because the mean of its divisors is an integer number (18483656085).

Almost surely, 2^97666725766 is an apocalyptic number.

97666725766 is a deficient number, since it is larger than the sum of its proper divisors (50202522914).

97666725766 is a wasteful number, since it uses less digits than its factorization.

97666725766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456386678.

The product of its digits is 240045120, while the sum is 67.

The spelling of 97666725766 in words is "ninety-seven billion, six hundred sixty-six million, seven hundred twenty-five thousand, seven hundred sixty-six".