40066647 has 4 divisors (see below), whose sum is σ = 53422200. Its totient is φ = 26711096.

The previous prime is 40066639. The next prime is 40066651. The reversal of 40066647 is 74666004.

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

It is a cyclic number.

It is not a de Polignac number, because 40066647 - 2³ = 40066639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40066657) 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, 6677772 + ... + 6677777.

It is an arithmetic number, because the mean of its divisors is an integer number (13355550).

Almost surely, 2^40066647 is an apocalyptic number.

40066647 is a deficient number, since it is larger than the sum of its proper divisors (13355553).

40066647 is a wasteful number, since it uses less digits than its factorization.

40066647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13355552.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 40066647 is about 6329.8220354130. The cubic root of 40066647 is about 342.1850252193.

The spelling of 40066647 in words is "forty million, sixty-six thousand, six hundred forty-seven".