1680745701 has 4 divisors (see below), whose sum is σ = 2240994272. Its totient is φ = 1120497132.

The previous prime is 1680745679. The next prime is 1680745727. The reversal of 1680745701 is 1075470861.

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 not a de Polignac number, because 1680745701 - 2¹⁴ = 1680729317 is a prime.

It is a super-2 number, since 2×1680745701² = 5649812222859962802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1680745701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680741701) 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, 280124281 + ... + 280124286.

It is an arithmetic number, because the mean of its divisors is an integer number (560248568).

Almost surely, 2^1680745701 is an apocalyptic number.

It is an amenable number.

1680745701 is a deficient number, since it is larger than the sum of its proper divisors (560248571).

1680745701 is an equidigital number, since it uses as much as digits as its factorization.

1680745701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560248570.

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 1680745701 is about 40996.8986753876. The cubic root of 1680745701 is about 1188.9602529695.

The spelling of 1680745701 in words is "one billion, six hundred eighty million, seven hundred forty-five thousand, seven hundred one".