396738636667 has 4 divisors (see below), whose sum is σ = 398815802496. Its totient is φ = 394661470840.

The previous prime is 396738636659. The next prime is 396738636677. The reversal of 396738636667 is 766636837693.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 396738636667 - 2³ = 396738636659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 396738636596 and 396738636605.

It is not an unprimeable number, because it can be changed into a prime (396738636677) 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, 1038582628 + ... + 1038583009.

It is an arithmetic number, because the mean of its divisors is an integer number (99703950624).

Almost surely, 2^396738636667 is an apocalyptic number.

396738636667 is a deficient number, since it is larger than the sum of its proper divisors (2077165829).

396738636667 is a wasteful number, since it uses less digits than its factorization.

396738636667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077165828.

The product of its digits is 740710656, while the sum is 70.

The spelling of 396738636667 in words is "three hundred ninety-six billion, seven hundred thirty-eight million, six hundred thirty-six thousand, six hundred sixty-seven".