40666451 has 16 divisors (see below), whose sum is σ = 48273408. Its totient is φ = 33523200.

The previous prime is 40666427. The next prime is 40666453. The reversal of 40666451 is 15466604.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40666451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40666453) 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, 41396 + ... + 42366.

It is an arithmetic number, because the mean of its divisors is an integer number (3017088).

Almost surely, 2^40666451 is an apocalyptic number.

40666451 is a deficient number, since it is larger than the sum of its proper divisors (7606957).

40666451 is a wasteful number, since it uses less digits than its factorization.

40666451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 40666451 is about 6377.0252469314. The cubic root of 40666451 is about 343.8840959582.

The spelling of 40666451 in words is "forty million, six hundred sixty-six thousand, four hundred fifty-one".