145504066 has 4 divisors (see below), whose sum is σ = 218256102. Its totient is φ = 72752032.

The previous prime is 145504043. The next prime is 145504067. The reversal of 145504066 is 660405541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 119443041 + 26061025 = 10929^2 + 5105^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (145504067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36376015 + ... + 36376018.

Almost surely, 2^145504066 is an apocalyptic number.

145504066 is a deficient number, since it is larger than the sum of its proper divisors (72752036).

145504066 is an equidigital number, since it uses as much as digits as its factorization.

145504066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72752035.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 145504066 is about 12062.5066217598. The cubic root of 145504066 is about 525.9668544512.

The spelling of 145504066 in words is "one hundred forty-five million, five hundred four thousand, sixty-six".