66710243 has 8 divisors (see below), whose sum is σ = 68516976. Its totient is φ = 64915200.

The previous prime is 66710221. The next prime is 66710279. The reversal of 66710243 is 34201766.

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 66710243 - 2²⁴ = 49933027 is a prime.

It is a super-2 number, since 2×66710243² = 8900513042238098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66740243) 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, 9323 + ... + 14843.

It is an arithmetic number, because the mean of its divisors is an integer number (8564622).

Almost surely, 2^66710243 is an apocalyptic number.

66710243 is a deficient number, since it is larger than the sum of its proper divisors (1806733).

66710243 is a wasteful number, since it uses less digits than its factorization.

66710243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5845.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 66710243 is about 8167.6338678959. The cubic root of 66710243 is about 405.5684604833.

The spelling of 66710243 in words is "sixty-six million, seven hundred ten thousand, two hundred forty-three".