1660464613 has 8 divisors (see below), whose sum is σ = 1791312408. Its totient is φ = 1533302784.

The previous prime is 1660464607. The next prime is 1660464677. The reversal of 1660464613 is 3164640661.

It can be written as a sum of positive squares in 4 ways, for example, as 554037444 + 1106427169 = 23538^2 + 33263^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1660464613 - 2¹⁷ = 1660333541 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 (1660464683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 920556 + ... + 922357.

It is an arithmetic number, because the mean of its divisors is an integer number (223914051).

Almost surely, 2^1660464613 is an apocalyptic number.

It is an amenable number.

1660464613 is a deficient number, since it is larger than the sum of its proper divisors (130847795).

1660464613 is a wasteful number, since it uses less digits than its factorization.

1660464613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842983.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 1660464613 is about 40748.7989148147. The cubic root of 1660464613 is about 1184.1586039376.

The spelling of 1660464613 in words is "one billion, six hundred sixty million, four hundred sixty-four thousand, six hundred thirteen".