66530146 has 8 divisors (see below), whose sum is σ = 105665580. Its totient is φ = 31308288.

The previous prime is 66530141. The next prime is 66530179. The reversal of 66530146 is 64103566.

It can be written as a sum of positive squares in 2 ways, for example, as 63824121 + 2706025 = 7989^2 + 1645^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66530141) 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, 978351 + ... + 978418.

Almost surely, 2^66530146 is an apocalyptic number.

66530146 is a deficient number, since it is larger than the sum of its proper divisors (39135434).

66530146 is a wasteful number, since it uses less digits than its factorization.

66530146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956788.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66530146 is about 8156.6013755730. The cubic root of 66530146 is about 405.2031618002.

The spelling of 66530146 in words is "sixty-six million, five hundred thirty thousand, one hundred forty-six".