140628666 has 8 divisors (see below), whose sum is σ = 281257344. Its totient is φ = 46876220.

The previous prime is 140628661. The next prime is 140628667. The reversal of 140628666 is 666826041.

It is a sphenic number, since it is the product of 3 distinct primes.

140628666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (140628661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11719050 + ... + 11719061.

It is an arithmetic number, because the mean of its divisors is an integer number (35157168).

Almost surely, 2^140628666 is an apocalyptic number.

140628666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140628666 is a wasteful number, since it uses less digits than its factorization.

140628666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23438116.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 140628666 is about 11858.6957967561. The cubic root of 140628666 is about 520.0254745903.

The spelling of 140628666 in words is "one hundred forty million, six hundred twenty-eight thousand, six hundred sixty-six".