140566667 has 2 divisors, whose sum is σ = 140566668. Its totient is φ = 140566666.

The previous prime is 140566661. The next prime is 140566681. The reversal of 140566667 is 766665041.

It is a weak prime.

It is an emirp because it is prime and its reverse (766665041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140566667 - 2⁴ = 140566651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140566661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70283333 + 70283334.

It is an arithmetic number, because the mean of its divisors is an integer number (70283334).

Almost surely, 2^140566667 is an apocalyptic number.

140566667 is a deficient number, since it is larger than the sum of its proper divisors (1).

140566667 is an equidigital number, since it uses as much as digits as its factorization.

140566667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 140566667 is about 11856.0814352804. The cubic root of 140566667 is about 519.9490420972.

The spelling of 140566667 in words is "one hundred forty million, five hundred sixty-six thousand, six hundred sixty-seven".