66452397 has 8 divisors (see below), whose sum is σ = 96658080. Its totient is φ = 40274160.

The previous prime is 66452387. The next prime is 66452401. The reversal of 66452397 is 79325466.

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

It is not a de Polignac number, because 66452397 - 2²⁴ = 49675181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66452377) 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, 1006822 + ... + 1006887.

It is an arithmetic number, because the mean of its divisors is an integer number (12082260).

Almost surely, 2^66452397 is an apocalyptic number.

It is an amenable number.

66452397 is a deficient number, since it is larger than the sum of its proper divisors (30205683).

66452397 is a wasteful number, since it uses less digits than its factorization.

66452397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013723.

The product of its digits is 272160, while the sum is 42.

The square root of 66452397 is about 8151.8339654338. The cubic root of 66452397 is about 405.0452563358.

The spelling of 66452397 in words is "sixty-six million, four hundred fifty-two thousand, three hundred ninety-seven".