40664129 has 8 divisors (see below), whose sum is σ = 44457120. Its totient is φ = 36887200.

The previous prime is 40664101. The next prime is 40664179. The reversal of 40664129 is 92146604.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40664129 - 2⁸ = 40663873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40664095 and 40664104.

It is not an unprimeable number, because it can be changed into a prime (40664179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1637 + ... + 9165.

It is an arithmetic number, because the mean of its divisors is an integer number (5557140).

Almost surely, 2^40664129 is an apocalyptic number.

It is an amenable number.

40664129 is a deficient number, since it is larger than the sum of its proper divisors (3792991).

40664129 is a wasteful number, since it uses less digits than its factorization.

40664129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8031.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 40664129 is about 6376.8431845232. The cubic root of 40664129 is about 343.8775507262.

The spelling of 40664129 in words is "forty million, six hundred sixty-four thousand, one hundred twenty-nine".