140805668 has 6 divisors (see below), whose sum is σ = 246409926. Its totient is φ = 70402832.

The previous prime is 140805667. The next prime is 140805697. The reversal of 140805668 is 866508041.

It can be written as a sum of positive squares in only one way, i.e., 138109504 + 2696164 = 11752^2 + 1642^2 .

It is a super-2 number, since 2×140805668² = 39652472281852448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140805661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17600705 + ... + 17600712.

It is an arithmetic number, because the mean of its divisors is an integer number (41068321).

Almost surely, 2^140805668 is an apocalyptic number.

It is an amenable number.

140805668 is a deficient number, since it is larger than the sum of its proper divisors (105604258).

140805668 is a wasteful number, since it uses less digits than its factorization.

140805668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35201421 (or 35201419 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 140805668 is about 11866.1564122508. The cubic root of 140805668 is about 520.2435594729.

The spelling of 140805668 in words is "one hundred forty million, eight hundred five thousand, six hundred sixty-eight".