40606669 has 2 divisors, whose sum is σ = 40606670. Its totient is φ = 40606668.

The previous prime is 40606651. The next prime is 40606679. The reversal of 40606669 is 96660604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24502500 + 16104169 = 4950^2 + 4013^2 .

It is a cyclic number.

It is not a de Polignac number, because 40606669 - 2⁹ = 40606157 is a prime.

It is a super-2 number, since 2×40606669² = 3297803134551122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40606609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20303334 + 20303335.

It is an arithmetic number, because the mean of its divisors is an integer number (20303335).

Almost surely, 2^40606669 is an apocalyptic number.

It is an amenable number.

40606669 is a deficient number, since it is larger than the sum of its proper divisors (1).

40606669 is an equidigital number, since it uses as much as digits as its factorization.

40606669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 40606669 is about 6372.3362277896. The cubic root of 40606669 is about 343.7155035796.

The spelling of 40606669 in words is "forty million, six hundred six thousand, six hundred sixty-nine".