6692998661 has 4 divisors (see below), whose sum is σ = 6694488192. Its totient is φ = 6691509132.

The previous prime is 6692998621. The next prime is 6692998693. The reversal of 6692998661 is 1668992966.

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 a cyclic number.

It is not a de Polignac number, because 6692998661 - 2¹⁴ = 6692982277 is a prime.

It is a super-2 number, since 2×6692998661² = 89592462152295585842, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6692998594 and 6692998603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6692998621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 738005 + ... + 747018.

It is an arithmetic number, because the mean of its divisors is an integer number (1673622048).

Almost surely, 2^6692998661 is an apocalyptic number.

It is an amenable number.

6692998661 is a deficient number, since it is larger than the sum of its proper divisors (1489531).

6692998661 is a wasteful number, since it uses less digits than its factorization.

6692998661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489530.

The product of its digits is 15116544, while the sum is 62.

The square root of 6692998661 is about 81810.7490553656. The cubic root of 6692998661 is about 1884.5467379909.

The spelling of 6692998661 in words is "six billion, six hundred ninety-two million, nine hundred ninety-eight thousand, six hundred sixty-one".