66227697 has 12 divisors (see below), whose sum is σ = 97887504. Its totient is φ = 43124760.

The previous prime is 66227671. The next prime is 66227701. The reversal of 66227697 is 79672266.

It is not a de Polignac number, because 66227697 - 2⁷ = 66227569 is a prime.

It is a super-2 number, since 2×66227697² = 8772215699847618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66227647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85179 + ... + 85952.

It is an arithmetic number, because the mean of its divisors is an integer number (8157292).

Almost surely, 2^66227697 is an apocalyptic number.

It is an amenable number.

66227697 is a deficient number, since it is larger than the sum of its proper divisors (31659807).

66227697 is a wasteful number, since it uses less digits than its factorization.

66227697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171180 (or 171177 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 66227697 is about 8138.0401203238. The cubic root of 66227697 is about 404.5882051236.

The spelling of 66227697 in words is "sixty-six million, two hundred twenty-seven thousand, six hundred ninety-seven".