66626197 has 8 divisors (see below), whose sum is σ = 72860832. Its totient is φ = 60421200.

The previous prime is 66626191. The next prime is 66626227. The reversal of 66626197 is 79162666.

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 66626197 - 2⁷ = 66626069 is a prime.

It is a pancake number, because a pancake can be divided into 66626197 parts by 11543 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66626191) 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, 2563 + ... + 11824.

It is an arithmetic number, because the mean of its divisors is an integer number (9107604).

Almost surely, 2^66626197 is an apocalyptic number.

It is an amenable number.

66626197 is a deficient number, since it is larger than the sum of its proper divisors (6234635).

66626197 is a wasteful number, since it uses less digits than its factorization.

66626197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14819.

The product of its digits is 163296, while the sum is 43.

The square root of 66626197 is about 8162.4871822258. The cubic root of 66626197 is about 405.3980682012.

The spelling of 66626197 in words is "sixty-six million, six hundred twenty-six thousand, one hundred ninety-seven".