40720066 has 8 divisors (see below), whose sum is σ = 64673100. Its totient is φ = 19162368.

The previous prime is 40720063. The next prime is 40720067. The reversal of 40720066 is 66002704.

40720066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 40259025 + 461041 = 6345^2 + 679^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 40720066.

It is not an unprimeable number, because it can be changed into a prime (40720063) 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 in 3 ways as a sum of consecutive naturals, for example, 598791 + ... + 598858.

Almost surely, 2^40720066 is an apocalyptic number.

40720066 is a deficient number, since it is larger than the sum of its proper divisors (23953034).

40720066 is a wasteful number, since it uses less digits than its factorization.

40720066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197668.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 40720066 is about 6381.2276248383. The cubic root of 40720066 is about 344.0351561780.

The spelling of 40720066 in words is "forty million, seven hundred twenty thousand, sixty-six".