397633436566 has 16 divisors (see below), whose sum is σ = 598893244560. Its totient is φ = 198002913120.

The previous prime is 397633436539. The next prime is 397633436587. The reversal of 397633436566 is 665634336793.

It is a super-3 number, since 3×397633436566³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302181 + ... + 1578271.

It is an arithmetic number, because the mean of its divisors is an integer number (37430827785).

Almost surely, 2^397633436566 is an apocalyptic number.

397633436566 is a deficient number, since it is larger than the sum of its proper divisors (201259807994).

397633436566 is a wasteful number, since it uses less digits than its factorization.

397633436566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279039.

The product of its digits is 132269760, while the sum is 61.

The spelling of 397633436566 in words is "three hundred ninety-seven billion, six hundred thirty-three million, four hundred thirty-six thousand, five hundred sixty-six".