40669599 has 4 divisors (see below), whose sum is σ = 54226136. Its totient is φ = 27113064.

The previous prime is 40669597. The next prime is 40669619. The reversal of 40669599 is 99596604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40669599 - 2¹ = 40669597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40669597) 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, 6778264 + ... + 6778269.

It is an arithmetic number, because the mean of its divisors is an integer number (13556534).

Almost surely, 2^40669599 is an apocalyptic number.

40669599 is a deficient number, since it is larger than the sum of its proper divisors (13556537).

40669599 is a wasteful number, since it uses less digits than its factorization.

40669599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13556536.

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

The square root of 40669599 is about 6377.2720657033. The cubic root of 40669599 is about 343.8929691135.

The spelling of 40669599 in words is "forty million, six hundred sixty-nine thousand, five hundred ninety-nine".