40066403 has 4 divisors (see below), whose sum is σ = 43148448. Its totient is φ = 36984360.

The previous prime is 40066393. The next prime is 40066409. The reversal of 40066403 is 30466004.

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

It is a cyclic number.

It is not a de Polignac number, because 40066403 - 2⁴ = 40066387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40066409) 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, 1541003 + ... + 1541028.

It is an arithmetic number, because the mean of its divisors is an integer number (10787112).

Almost surely, 2^40066403 is an apocalyptic number.

40066403 is a deficient number, since it is larger than the sum of its proper divisors (3082045).

40066403 is a wasteful number, since it uses less digits than its factorization.

40066403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082044.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 40066403 is about 6329.8027615400. The cubic root of 40066403 is about 342.1843305990.

The spelling of 40066403 in words is "forty million, sixty-six thousand, four hundred three".