66465226 has 4 divisors (see below), whose sum is σ = 99697842. Its totient is φ = 33232612.

The previous prime is 66465221. The next prime is 66465241. The reversal of 66465226 is 62256466.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 64016001 + 2449225 = 8001^2 + 1565^2 .

It is not an unprimeable number, because it can be changed into a prime (66465221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16616305 + ... + 16616308.

Almost surely, 2^66465226 is an apocalyptic number.

66465226 is a deficient number, since it is larger than the sum of its proper divisors (33232616).

66465226 is a wasteful number, since it uses less digits than its factorization.

66465226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33232615.

The product of its digits is 103680, while the sum is 37.

The square root of 66465226 is about 8152.6208056060. The cubic root of 66465226 is about 405.0713200619.

The spelling of 66465226 in words is "sixty-six million, four hundred sixty-five thousand, two hundred twenty-six".