659618741 has 4 divisors (see below), whose sum is σ = 660599532. Its totient is φ = 658637952.

The previous prime is 659618723. The next prime is 659618767. The reversal of 659618741 is 147816956.

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 466992100 + 192626641 = 21610^2 + 13879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-659618741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659615741) 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, 489386 + ... + 490731.

It is an arithmetic number, because the mean of its divisors is an integer number (165149883).

Almost surely, 2^659618741 is an apocalyptic number.

It is an amenable number.

659618741 is a deficient number, since it is larger than the sum of its proper divisors (980791).

659618741 is an equidigital number, since it uses as much as digits as its factorization.

659618741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980790.

The product of its digits is 362880, while the sum is 47.

The square root of 659618741 is about 25683.0438421928. The cubic root of 659618741 is about 870.4910870819.

The spelling of 659618741 in words is "six hundred fifty-nine million, six hundred eighteen thousand, seven hundred forty-one".