140665537 has 4 divisors (see below), whose sum is σ = 140967216. Its totient is φ = 140363860.

The previous prime is 140665519. The next prime is 140665561. The reversal of 140665537 is 735566041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140665537 - 2¹⁵ = 140632769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140665496 and 140665505.

It is not an unprimeable number, because it can be changed into a prime (140665597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150139 + ... + 151072.

It is an arithmetic number, because the mean of its divisors is an integer number (35241804).

Almost surely, 2^140665537 is an apocalyptic number.

It is an amenable number.

140665537 is a deficient number, since it is larger than the sum of its proper divisors (301679).

140665537 is an equidigital number, since it uses as much as digits as its factorization.

140665537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301678.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 140665537 is about 11860.2502924685. The cubic root of 140665537 is about 520.0709185820.

The spelling of 140665537 in words is "one hundred forty million, six hundred sixty-five thousand, five hundred thirty-seven".