6209881066 has 4 divisors (see below), whose sum is σ = 9314821602. Its totient is φ = 3104940532.

The previous prime is 6209881061. The next prime is 6209881079. The reversal of 6209881066 is 6601889026.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6601889026 = 2 ⋅3300944513.

It can be written as a sum of positive squares in only one way, i.e., 3502864225 + 2707016841 = 59185^2 + 52029^2 .

It is not an unprimeable number, because it can be changed into a prime (6209881061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1552470265 + ... + 1552470268.

Almost surely, 2^6209881066 is an apocalyptic number.

6209881066 is a deficient number, since it is larger than the sum of its proper divisors (3104940536).

6209881066 is a wasteful number, since it uses less digits than its factorization.

6209881066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104940535.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 6209881066 is about 78802.7985924358. The cubic root of 6209881066 is about 1838.0659681977.

The spelling of 6209881066 in words is "six billion, two hundred nine million, eight hundred eighty-one thousand, sixty-six".