40066426 has 4 divisors (see below), whose sum is σ = 60099642. Its totient is φ = 20033212.

The previous prime is 40066423. The next prime is 40066427. The reversal of 40066426 is 62466004.

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., 34234201 + 5832225 = 5851^2 + 2415^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40066394 and 40066403.

It is not an unprimeable number, because it can be changed into a prime (40066423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10016605 + ... + 10016608.

Almost surely, 2^40066426 is an apocalyptic number.

40066426 is a deficient number, since it is larger than the sum of its proper divisors (20033216).

40066426 is a wasteful number, since it uses less digits than its factorization.

40066426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20033215.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 40066426 is about 6329.8045783421. The cubic root of 40066426 is about 342.1843960756.

The spelling of 40066426 in words is "forty million, sixty-six thousand, four hundred twenty-six".