66290239 has 8 divisors (see below), whose sum is σ = 67148640. Its totient is φ = 65436000.

The previous prime is 66290197. The next prime is 66290281. The reversal of 66290239 is 93209266.

It is an interprime number because it is at equal distance from previous prime (66290197) and next prime (66290281).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66290239 - 2⁷ = 66290111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66290198 and 66290207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66290299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41742 + ... + 43300.

It is an arithmetic number, because the mean of its divisors is an integer number (8393580).

Almost surely, 2^66290239 is an apocalyptic number.

66290239 is a deficient number, since it is larger than the sum of its proper divisors (858401).

66290239 is a wasteful number, since it uses less digits than its factorization.

66290239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 66290239 is about 8141.8817849438. The cubic root of 66290239 is about 404.7155224226.

The spelling of 66290239 in words is "sixty-six million, two hundred ninety thousand, two hundred thirty-nine".