66040045 has 8 divisors (see below), whose sum is σ = 81091296. Its totient is φ = 51603216.

The previous prime is 66040043. The next prime is 66040049. The reversal of 66040045 is 54004066.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66040045 - 2¹ = 66040043 is a prime.

It is a super-2 number, since 2×66040045² = 8722575087204050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66040043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153367 + ... + 153796.

It is an arithmetic number, because the mean of its divisors is an integer number (10136412).

Almost surely, 2^66040045 is an apocalyptic number.

It is an amenable number.

66040045 is a deficient number, since it is larger than the sum of its proper divisors (15051251).

66040045 is a wasteful number, since it uses less digits than its factorization.

66040045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307211.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 66040045 is about 8126.5026302832. The cubic root of 66040045 is about 404.2057185964.

The spelling of 66040045 in words is "sixty-six million, forty thousand, forty-five".