6616001898 has 48 divisors (see below), whose sum is σ = 15688251072. Its totient is φ = 1998384000.

The previous prime is 6616001897. The next prime is 6616001929. The reversal of 6616001898 is 8981006166.

It is a happy number.

It is a super-2 number, since 2×6616001898² = 87542962228679204808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6616001891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7858 + ... + 115298.

It is an arithmetic number, because the mean of its divisors is an integer number (326838564).

Almost surely, 2^6616001898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6616001898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7844125536).

6616001898 is an abundant number, since it is smaller than the sum of its proper divisors (9072249174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6616001898 is a wasteful number, since it uses less digits than its factorization.

6616001898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107771 (or 107768 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 6616001898 is about 81338.8092978991. The cubic root of 6616001898 is about 1877.2921914226.

The spelling of 6616001898 in words is "six billion, six hundred sixteen million, one thousand, eight hundred ninety-eight".