40066619 has 2 divisors, whose sum is σ = 40066620. Its totient is φ = 40066618.

The previous prime is 40066591. The next prime is 40066639. The reversal of 40066619 is 91666004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40066619 - 2¹⁶ = 40001083 is a prime.

It is a super-2 number, since 2×40066619² = 3210667916182322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40066639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20033309 + 20033310.

It is an arithmetic number, because the mean of its divisors is an integer number (20033310).

Almost surely, 2^40066619 is an apocalyptic number.

40066619 is a deficient number, since it is larger than the sum of its proper divisors (1).

40066619 is an equidigital number, since it uses as much as digits as its factorization.

40066619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 40066619 is about 6329.8198236601. The cubic root of 40066619 is about 342.1849455089.

The spelling of 40066619 in words is "forty million, sixty-six thousand, six hundred nineteen".