40666003 has 16 divisors (see below), whose sum is σ = 47900160. Its totient is φ = 33800256.

The previous prime is 40665991. The next prime is 40666007. The reversal of 40666003 is 30066604.

40666003 = T₃₆₂ + T₃₆₃ + ... + T₆₆₂.

It is a happy number.

It is not a de Polignac number, because 40666003 - 2²¹ = 38568851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40666007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49863 + ... + 50671.

It is an arithmetic number, because the mean of its divisors is an integer number (2993760).

Almost surely, 2^40666003 is an apocalyptic number.

40666003 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

40666003 is a deficient number, since it is larger than the sum of its proper divisors (7234157).

40666003 is a wasteful number, since it uses less digits than its factorization.

40666003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 40666003 is about 6376.9901207388. The cubic root of 40666003 is about 343.8828331594.

The spelling of 40666003 in words is "forty million, six hundred sixty-six thousand, three".