97666213 has 8 divisors (see below), whose sum is σ = 106123520. Its totient is φ = 89540640.

The previous prime is 97666193. The next prime is 97666253. The reversal of 97666213 is 31266679.

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

It is a cyclic number.

It is not a de Polignac number, because 97666213 - 2²⁵ = 64111781 is a prime.

It is a super-2 number, since 2×97666213² = 19077378323522738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97666253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82320 + ... + 83497.

It is an arithmetic number, because the mean of its divisors is an integer number (13265440).

Almost surely, 2^97666213 is an apocalyptic number.

It is an amenable number.

97666213 is a deficient number, since it is larger than the sum of its proper divisors (8457307).

97666213 is a wasteful number, since it uses less digits than its factorization.

97666213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165867.

The product of its digits is 81648, while the sum is 40.

The square root of 97666213 is about 9882.6217675271. The cubic root of 97666213 is about 460.5195971733.

It can be divided in two parts, 97666 and 213, that added together give a palindrome (97879).

The spelling of 97666213 in words is "ninety-seven million, six hundred sixty-six thousand, two hundred thirteen".