66206697 has 8 divisors (see below), whose sum is σ = 92921760. Its totient is φ = 41814720.

The previous prime is 66206689. The next prime is 66206729. The reversal of 66206697 is 79660266.

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

It is not a de Polignac number, because 66206697 - 2³ = 66206689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66206617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 580704 + ... + 580817.

It is an arithmetic number, because the mean of its divisors is an integer number (11615220).

Almost surely, 2^66206697 is an apocalyptic number.

It is an amenable number.

66206697 is a deficient number, since it is larger than the sum of its proper divisors (26715063).

66206697 is a wasteful number, since it uses less digits than its factorization.

66206697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161543.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 66206697 is about 8136.7497810858. The cubic root of 66206697 is about 404.5454372642.

The spelling of 66206697 in words is "sixty-six million, two hundred six thousand, six hundred ninety-seven".