66652339 has 4 divisors (see below), whose sum is σ = 71779456. Its totient is φ = 61525224.

The previous prime is 66652303. The next prime is 66652343. The reversal of 66652339 is 93325666.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66652339 - 2⁷ = 66652211 is a prime.

It is a super-4 number, since 4×66652339⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66652039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2563539 + ... + 2563564.

It is an arithmetic number, because the mean of its divisors is an integer number (17944864).

Almost surely, 2^66652339 is an apocalyptic number.

66652339 is a deficient number, since it is larger than the sum of its proper divisors (5127117).

66652339 is a wasteful number, since it uses less digits than its factorization.

66652339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5127116.

The product of its digits is 174960, while the sum is 40.

The square root of 66652339 is about 8164.0883753178. The cubic root of 66652339 is about 405.4510830361.

The spelling of 66652339 in words is "sixty-six million, six hundred fifty-two thousand, three hundred thirty-nine".