1679898661 has 8 divisors (see below), whose sum is σ = 2020930880. Its totient is φ = 1364128128.

The previous prime is 1679898659. The next prime is 1679898667. The reversal of 1679898661 is 1668989761.

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 1679898661 - 2¹ = 1679898659 is a prime.

It is a super-2 number, since 2×1679898661² = 5644119022459185842, 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 1679898661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679898667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6315276 + ... + 6315541.

It is an arithmetic number, because the mean of its divisors is an integer number (252616360).

Almost surely, 2^1679898661 is an apocalyptic number.

It is an amenable number.

1679898661 is a deficient number, since it is larger than the sum of its proper divisors (341032219).

1679898661 is a wasteful number, since it uses less digits than its factorization.

1679898661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12630843.

The product of its digits is 7838208, while the sum is 61.

The square root of 1679898661 is about 40986.5668359769. The cubic root of 1679898661 is about 1188.7604872503.

The spelling of 1679898661 in words is "one billion, six hundred seventy-nine million, eight hundred ninety-eight thousand, six hundred sixty-one".