40006653 has 4 divisors (see below), whose sum is σ = 53342208. Its totient is φ = 26671100.

The previous prime is 40006621. The next prime is 40006663. The reversal of 40006653 is 35660004.

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 a cyclic number.

It is not a de Polignac number, because 40006653 - 2⁵ = 40006621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40006663) 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, 6667773 + ... + 6667778.

It is an arithmetic number, because the mean of its divisors is an integer number (13335552).

Almost surely, 2^40006653 is an apocalyptic number.

It is an amenable number.

40006653 is a deficient number, since it is larger than the sum of its proper divisors (13335555).

40006653 is a wasteful number, since it uses less digits than its factorization.

40006653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13335554.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 40006653 is about 6325.0812643001. The cubic root of 40006653 is about 342.0141490675.

Adding to 40006653 its reverse (35660004), we get a palindrome (75666657).

The spelling of 40006653 in words is "forty million, six thousand, six hundred fifty-three".