66387254 has 8 divisors (see below), whose sum is σ = 104822040. Its totient is φ = 31446576.

The previous prime is 66387247. The next prime is 66387257. The reversal of 66387254 is 45278366.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66387257) 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, 873479 + ... + 873554.

It is an arithmetic number, because the mean of its divisors is an integer number (13102755).

Almost surely, 2^66387254 is an apocalyptic number.

66387254 is a deficient number, since it is larger than the sum of its proper divisors (38434786).

66387254 is a wasteful number, since it uses less digits than its factorization.

66387254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747054.

The product of its digits is 241920, while the sum is 41.

The square root of 66387254 is about 8147.8373817842. The cubic root of 66387254 is about 404.9128583536.

The spelling of 66387254 in words is "sixty-six million, three hundred eighty-seven thousand, two hundred fifty-four".