66298796397 has 12 divisors (see below), whose sum is σ = 99067167420. Its totient is φ = 42675087168.

The previous prime is 66298796393. The next prime is 66298796413. The reversal of 66298796397 is 79369789266.

66298796397 is a `hidden beast` number, since 6 + 62 + 98 + 7 + 96 + 397 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33949536516 + 32349259881 = 184254^2 + 179859^2 .

It is not a de Polignac number, because 66298796397 - 2² = 66298796393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66298796393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127008928 + ... + 127009449.

It is an arithmetic number, because the mean of its divisors is an integer number (8255597285).

Almost surely, 2^66298796397 is an apocalyptic number.

It is an amenable number.

66298796397 is a deficient number, since it is larger than the sum of its proper divisors (32768371023).

66298796397 is a wasteful number, since it uses less digits than its factorization.

66298796397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254018412 (or 254018409 counting only the distinct ones).

The product of its digits is 370355328, while the sum is 72.

The spelling of 66298796397 in words is "sixty-six billion, two hundred ninety-eight million, seven hundred ninety-six thousand, three hundred ninety-seven".