40066331 has 4 divisors (see below), whose sum is σ = 42423192. Its totient is φ = 37709472.

The previous prime is 40066321. The next prime is 40066339. The reversal of 40066331 is 13366004.

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 40066331 - 2²² = 35872027 is a prime.

It is a super-2 number, since 2×40066331² = 3210621759603122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40066297 and 40066306.

It is not an unprimeable number, because it can be changed into a prime (40066339) 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, 1178405 + ... + 1178438.

It is an arithmetic number, because the mean of its divisors is an integer number (10605798).

Almost surely, 2^40066331 is an apocalyptic number.

40066331 is a deficient number, since it is larger than the sum of its proper divisors (2356861).

40066331 is a wasteful number, since it uses less digits than its factorization.

40066331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356860.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 40066331 is about 6329.7970741565. The cubic root of 40066331 is about 342.1841256285.

The spelling of 40066331 in words is "forty million, sixty-six thousand, three hundred thirty-one".