66299238 has 48 divisors (see below), whose sum is σ = 146764800. Its totient is φ = 21626352.

The previous prime is 66299221. The next prime is 66299243. The reversal of 66299238 is 83299266.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66299193 and 66299202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 297195 + ... + 297417.

It is an arithmetic number, because the mean of its divisors is an integer number (3057600).

Almost surely, 2^66299238 is an apocalyptic number.

66299238 is an abundant number, since it is smaller than the sum of its proper divisors (80465562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66299238 is a wasteful number, since it uses less digits than its factorization.

66299238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 510 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 66299238 is about 8142.4344025605. The cubic root of 66299238 is about 404.7338351750.

The spelling of 66299238 in words is "sixty-six million, two hundred ninety-nine thousand, two hundred thirty-eight".