40180669 has 2 divisors, whose sum is σ = 40180670. Its totient is φ = 40180668.

The previous prime is 40180663. The next prime is 40180691. The reversal of 40180669 is 96608104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29702500 + 10478169 = 5450^2 + 3237^2 .

It is a cyclic number.

It is not a de Polignac number, because 40180669 - 2⁷ = 40180541 is a prime.

It is a super-2 number, since 2×40180669² = 3228972322575122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40180663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20090334 + 20090335.

It is an arithmetic number, because the mean of its divisors is an integer number (20090335).

Almost surely, 2^40180669 is an apocalyptic number.

It is an amenable number.

40180669 is a deficient number, since it is larger than the sum of its proper divisors (1).

40180669 is an equidigital number, since it uses as much as digits as its factorization.

40180669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 40180669 is about 6338.8223669701. The cubic root of 40180669 is about 342.5093154623.

The spelling of 40180669 in words is "forty million, one hundred eighty thousand, six hundred sixty-nine".