140665545 has 32 divisors (see below), whose sum is σ = 250569600. Its totient is φ = 74872512.

The previous prime is 140665519. The next prime is 140665561. The reversal of 140665545 is 545566041.

140665545 is a `hidden beast` number, since 1 + 40 + 66 + 554 + 5 = 666.

It is not a de Polignac number, because 140665545 - 2¹⁰ = 140664521 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115359 + ... + 116571.

It is an arithmetic number, because the mean of its divisors is an integer number (7830300).

Almost surely, 2^140665545 is an apocalyptic number.

140665545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

140665545 is a deficient number, since it is larger than the sum of its proper divisors (109904055).

140665545 is a wasteful number, since it uses less digits than its factorization.

140665545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086 (or 2080 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 140665545 is about 11860.2506297295. The cubic root of 140665545 is about 520.0709284412.

The spelling of 140665545 in words is "one hundred forty million, six hundred sixty-five thousand, five hundred forty-five".