40666577 has 4 divisors (see below), whose sum is σ = 46476096. Its totient is φ = 34857060.

The previous prime is 40666573. The next prime is 40666579. The reversal of 40666577 is 77566604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40666577 - 2² = 40666573 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40666573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2904749 + ... + 2904762.

It is an arithmetic number, because the mean of its divisors is an integer number (11619024).

Almost surely, 2^40666577 is an apocalyptic number.

It is an amenable number.

40666577 is a deficient number, since it is larger than the sum of its proper divisors (5809519).

40666577 is an equidigital number, since it uses as much as digits as its factorization.

40666577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5809518.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 40666577 is about 6377.0351261382. The cubic root of 40666577 is about 343.8844511187.

The spelling of 40666577 in words is "forty million, six hundred sixty-six thousand, five hundred seventy-seven".