40566999 has 16 divisors (see below), whose sum is σ = 60447744. Its totient is φ = 23985600.

The previous prime is 40566973. The next prime is 40567019. The reversal of 40566999 is 99966504.

It is a happy number.

It is not a de Polignac number, because 40566999 - 2¹² = 40562903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40561999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13639 + ... + 16344.

It is an arithmetic number, because the mean of its divisors is an integer number (3777984).

Almost surely, 2^40566999 is an apocalyptic number.

40566999 is a deficient number, since it is larger than the sum of its proper divisors (19880745).

40566999 is a wasteful number, since it uses less digits than its factorization.

40566999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30038.

The product of its (nonzero) digits is 524880, while the sum is 48.

The square root of 40566999 is about 6369.2227940307. Note that the first 3 decimals coincide. The cubic root of 40566999 is about 343.6035380905.

The spelling of 40566999 in words is "forty million, five hundred sixty-six thousand, nine hundred ninety-nine".