6650121199 has 4 divisors (see below), whose sum is σ = 6651640080. Its totient is φ = 6648602320.

The previous prime is 6650121187. The next prime is 6650121253. The reversal of 6650121199 is 9911210566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9911210566 = 2 ⋅4955605283.

It is a cyclic number.

It is not a de Polignac number, because 6650121199 - 2¹⁹ = 6649596911 is a prime.

It is a super-2 number, since 2×6650121199² = 88448223922778395202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6650121799) 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, 752854 + ... + 761635.

It is an arithmetic number, because the mean of its divisors is an integer number (1662910020).

Almost surely, 2^6650121199 is an apocalyptic number.

6650121199 is a deficient number, since it is larger than the sum of its proper divisors (1518881).

6650121199 is a wasteful number, since it uses less digits than its factorization.

6650121199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518880.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 6650121199 is about 81548.2752668626. The cubic root of 6650121199 is about 1880.5137798094.

The spelling of 6650121199 in words is "six billion, six hundred fifty million, one hundred twenty-one thousand, one hundred ninety-nine".