66140635 has 16 divisors (see below), whose sum is σ = 87033600. Its totient is φ = 47852640.

The previous prime is 66140623. The next prime is 66140647. The reversal of 66140635 is 53604166.

It is an interprime number because it is at equal distance from previous prime (66140623) and next prime (66140647).

It is not a de Polignac number, because 66140635 - 2⁵ = 66140603 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66140597 and 66140606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7924 + ... + 13966.

It is an arithmetic number, because the mean of its divisors is an integer number (5439600).

Almost surely, 2^66140635 is an apocalyptic number.

66140635 is a deficient number, since it is larger than the sum of its proper divisors (20892965).

66140635 is a wasteful number, since it uses less digits than its factorization.

66140635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6258.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66140635 is about 8132.6892846094. The cubic root of 66140635 is about 404.4108387230.

The spelling of 66140635 in words is "sixty-six million, one hundred forty thousand, six hundred thirty-five".