40566971 has 2 divisors, whose sum is σ = 40566972. Its totient is φ = 40566970.

The previous prime is 40566937. The next prime is 40566973. The reversal of 40566971 is 17966504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40566971 is a prime.

It is a super-2 number, since 2×40566971² = 3291358272229682, which contains 22 as substring.

Together with 40566973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40566973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20283485 + 20283486.

It is an arithmetic number, because the mean of its divisors is an integer number (20283486).

Almost surely, 2^40566971 is an apocalyptic number.

40566971 is a deficient number, since it is larger than the sum of its proper divisors (1).

40566971 is an equidigital number, since it uses as much as digits as its factorization.

40566971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 40566971 is about 6369.2205959599. The cubic root of 40566971 is about 343.6034590369.

It can be divided in two parts, 405 and 66971, that added together give a palindrome (67376).

The spelling of 40566971 in words is "forty million, five hundred sixty-six thousand, nine hundred seventy-one".