40664626 has 4 divisors (see below), whose sum is σ = 60996942. Its totient is φ = 20332312.

The previous prime is 40664623. The next prime is 40664651. The reversal of 40664626 is 62646604.

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

It can be written as a sum of positive squares in only one way, i.e., 35820225 + 4844401 = 5985^2 + 2201^2 .

It is a super-2 number, since 2×40664626² = 3307223615439752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40664591 and 40664600.

It is not an unprimeable number, because it can be changed into a prime (40664623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10166155 + ... + 10166158.

Almost surely, 2^40664626 is an apocalyptic number.

40664626 is a deficient number, since it is larger than the sum of its proper divisors (20332316).

40664626 is a wasteful number, since it uses less digits than its factorization.

40664626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20332315.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 40664626 is about 6376.8821535293. The cubic root of 40664626 is about 343.8789516861.

The spelling of 40664626 in words is "forty million, six hundred sixty-four thousand, six hundred twenty-six".