40669777 has 2 divisors, whose sum is σ = 40669778. Its totient is φ = 40669776.

The previous prime is 40669757. The next prime is 40669793. The reversal of 40669777 is 77796604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39450961 + 1218816 = 6281^2 + 1104^2 .

It is a cyclic number.

It is not a de Polignac number, because 40669777 - 2¹¹ = 40667729 is a prime.

It is a super-2 number, since 2×40669777² = 3308061522459458, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40669757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20334888 + 20334889.

It is an arithmetic number, because the mean of its divisors is an integer number (20334889).

Almost surely, 2^40669777 is an apocalyptic number.

It is an amenable number.

40669777 is a deficient number, since it is larger than the sum of its proper divisors (1).

40669777 is an equidigital number, since it uses as much as digits as its factorization.

40669777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 46.

The square root of 40669777 is about 6377.2860214985. The cubic root of 40669777 is about 343.8934708220.

The spelling of 40669777 in words is "forty million, six hundred sixty-nine thousand, seven hundred seventy-seven".