66238315 has 16 divisors (see below), whose sum is σ = 93383136. Its totient is φ = 44467200.

The previous prime is 66238309. The next prime is 66238327. The reversal of 66238315 is 51383266.

It is not a de Polignac number, because 66238315 - 2⁷ = 66238187 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45606 + ... + 47035.

It is an arithmetic number, because the mean of its divisors is an integer number (5836446).

Almost surely, 2^66238315 is an apocalyptic number.

66238315 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66238315 is a deficient number, since it is larger than the sum of its proper divisors (27144821).

66238315 is a wasteful number, since it uses less digits than its factorization.

66238315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92670.

The product of its digits is 25920, while the sum is 34.

The square root of 66238315 is about 8138.6924625520. The cubic root of 66238315 is about 404.6098259267.

The spelling of 66238315 in words is "sixty-six million, two hundred thirty-eight thousand, three hundred fifteen".