40066651 has 2 divisors, whose sum is σ = 40066652. Its totient is φ = 40066650.

The previous prime is 40066639. The next prime is 40066657. The reversal of 40066651 is 15666004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40066651 - 2⁵ = 40066619 is a prime.

It is equal to p_2437426 and since 40066651 and 2437426 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40066657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20033325 + 20033326.

It is an arithmetic number, because the mean of its divisors is an integer number (20033326).

Almost surely, 2^40066651 is an apocalyptic number.

40066651 is a deficient number, since it is larger than the sum of its proper divisors (1).

40066651 is an equidigital number, since it uses as much as digits as its factorization.

40066651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 40066651 is about 6329.8223513776. The cubic root of 40066651 is about 342.1850366065.

The spelling of 40066651 in words is "forty million, sixty-six thousand, six hundred fifty-one".