66381514 has 8 divisors (see below), whose sum is σ = 100078308. Its totient is φ = 33022080.

The previous prime is 66381479. The next prime is 66381517. The reversal of 66381514 is 41518366.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 58446025 + 7935489 = 7645^2 + 2817^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 66381514.

It is not an unprimeable number, because it can be changed into a prime (66381517) 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, 83847 + ... + 84634.

Almost surely, 2^66381514 is an apocalyptic number.

66381514 is a deficient number, since it is larger than the sum of its proper divisors (33696794).

66381514 is a wasteful number, since it uses less digits than its factorization.

66381514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168680.

The product of its digits is 17280, while the sum is 34.

The square root of 66381514 is about 8147.4851334630. The cubic root of 66381514 is about 404.9011881074.

The spelling of 66381514 in words is "sixty-six million, three hundred eighty-one thousand, five hundred fourteen".