40166587 has 2 divisors, whose sum is σ = 40166588. Its totient is φ = 40166586.

The previous prime is 40166573. The next prime is 40166603. The reversal of 40166587 is 78566104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40166587 - 2⁷ = 40166459 is a prime.

It is a super-2 number, since 2×40166587² = 3226709422457138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40166557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20083293 + 20083294.

It is an arithmetic number, because the mean of its divisors is an integer number (20083294).

Almost surely, 2^40166587 is an apocalyptic number.

40166587 is a deficient number, since it is larger than the sum of its proper divisors (1).

40166587 is an equidigital number, since it uses as much as digits as its factorization.

40166587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 40166587 is about 6337.7114954848. The cubic root of 40166587 is about 342.4692980454.

The spelling of 40166587 in words is "forty million, one hundred sixty-six thousand, five hundred eighty-seven".