140424610661 has 4 divisors (see below), whose sum is σ = 140427127500. Its totient is φ = 140422093824.

The previous prime is 140424610609. The next prime is 140424610687. The reversal of 140424610661 is 166016424041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44281205761 + 96143404900 = 210431^2 + 310070^2 .

It is a cyclic number.

It is not a de Polignac number, because 140424610661 - 2¹⁸ = 140424348517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140424610561) 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, 1172786 + ... + 1286963.

It is an arithmetic number, because the mean of its divisors is an integer number (35106781875).

Almost surely, 2^140424610661 is an apocalyptic number.

It is an amenable number.

140424610661 is a deficient number, since it is larger than the sum of its proper divisors (2516839).

140424610661 is an equidigital number, since it uses as much as digits as its factorization.

140424610661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516838.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 140424610661 in words is "one hundred forty billion, four hundred twenty-four million, six hundred ten thousand, six hundred sixty-one".