66145034 has 4 divisors (see below), whose sum is σ = 99217554. Its totient is φ = 33072516.

The previous prime is 66145031. The next prime is 66145039. The reversal of 66145034 is 43054166.

It is a happy number.

66145034 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 58599025 + 7546009 = 7655^2 + 2747^2 .

It is a super-2 number, since 2×66145034² = 8750331045722312, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66144988 and 66145006.

It is not an unprimeable number, because it can be changed into a prime (66145031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16536257 + ... + 16536260.

Almost surely, 2^66145034 is an apocalyptic number.

66145034 is a deficient number, since it is larger than the sum of its proper divisors (33072520).

66145034 is a wasteful number, since it uses less digits than its factorization.

66145034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33072519.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 66145034 is about 8132.9597318565. The cubic root of 66145034 is about 404.4198042848.

The spelling of 66145034 in words is "sixty-six million, one hundred forty-five thousand, thirty-four".