6618431097 has 6 divisors (see below), whose sum is σ = 9559956042. Its totient is φ = 4412287392.

The previous prime is 6618431003. The next prime is 6618431123. The reversal of 6618431097 is 7901348166.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4109322816 + 2509108281 = 64104^2 + 50091^2 .

It is not a de Polignac number, because 6618431097 - 2¹⁵ = 6618398329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6618431297) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 367690608 + ... + 367690625.

It is an arithmetic number, because the mean of its divisors is an integer number (1593326007).

Almost surely, 2^6618431097 is an apocalyptic number.

It is an amenable number.

6618431097 is a deficient number, since it is larger than the sum of its proper divisors (2941524945).

6618431097 is a wasteful number, since it uses less digits than its factorization.

6618431097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735381239 (or 735381236 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 6618431097 is about 81353.7405224861. The cubic root of 6618431097 is about 1877.5219252488.

The spelling of 6618431097 in words is "six billion, six hundred eighteen million, four hundred thirty-one thousand, ninety-seven".