7844066897 has 4 divisors (see below), whose sum is σ = 7856191296. Its totient is φ = 7831942500.

The previous prime is 7844066819. The next prime is 7844066903. The reversal of 7844066897 is 7986604487.

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 7844066897 - 2³² = 3549099601 is a prime.

It is a super-2 number, since 2×7844066897² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7844036897) 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, 6061229 + ... + 6062522.

It is an arithmetic number, because the mean of its divisors is an integer number (1964047824).

Almost surely, 2^7844066897 is an apocalyptic number.

It is an amenable number.

7844066897 is a deficient number, since it is larger than the sum of its proper divisors (12124399).

7844066897 is a wasteful number, since it uses less digits than its factorization.

7844066897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12124398.

The product of its (nonzero) digits is 16257024, while the sum is 59.

The square root of 7844066897 is about 88566.7369671029. The cubic root of 7844066897 is about 1986.9202209143.

The spelling of 7844066897 in words is "seven billion, eight hundred forty-four million, sixty-six thousand, eight hundred ninety-seven".