1701664665 has 16 divisors (see below), whose sum is σ = 2749622976. Its totient is φ = 898568000.

The previous prime is 1701664663. The next prime is 1701664747. The reversal of 1701664665 is 5664661071.

It is a happy number.

It is not a de Polignac number, because 1701664665 - 2¹ = 1701664663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1701664663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560091 + ... + 563120.

It is an arithmetic number, because the mean of its divisors is an integer number (171851436).

Almost surely, 2^1701664665 is an apocalyptic number.

1701664665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1701664665 is a deficient number, since it is larger than the sum of its proper divisors (1047958311).

1701664665 is a wasteful number, since it uses less digits than its factorization.

1701664665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123320.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 1701664665 is about 41251.2383450485. The cubic root of 1701664665 is about 1193.8726236068.

The spelling of 1701664665 in words is "one billion, seven hundred one million, six hundred sixty-four thousand, six hundred sixty-five".