97219666 has 8 divisors (see below), whose sum is σ = 152169984. Its totient is φ = 46496340.

The previous prime is 97219657. The next prime is 97219667. The reversal of 97219666 is 66691279.

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

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 2113471 = 97219666 / (9 + 7 + 2 + 1 + 9 + 6 + 6 + 6).

It is not an unprimeable number, because it can be changed into a prime (97219667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056690 + ... + 1056781.

It is an arithmetic number, because the mean of its divisors is an integer number (19021248).

Almost surely, 2^97219666 is an apocalyptic number.

97219666 is a deficient number, since it is larger than the sum of its proper divisors (54950318).

97219666 is a wasteful number, since it uses less digits than its factorization.

97219666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113496.

The product of its digits is 244944, while the sum is 46.

The square root of 97219666 is about 9860.0033468554. The cubic root of 97219666 is about 459.8166660720.

The spelling of 97219666 in words is "ninety-seven million, two hundred nineteen thousand, six hundred sixty-six".