678780673237 has 16 divisors (see below), whose sum is σ = 699601033152. Its totient is φ = 658092090240.

The previous prime is 678780673231. The next prime is 678780673247. The reversal of 678780673237 is 732376087876.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678780673237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678780673231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39030858 + ... + 39048244.

It is an arithmetic number, because the mean of its divisors is an integer number (43725064572).

Almost surely, 2^678780673237 is an apocalyptic number.

It is an amenable number.

678780673237 is a deficient number, since it is larger than the sum of its proper divisors (20820359915).

678780673237 is a wasteful number, since it uses less digits than its factorization.

678780673237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21108.

The product of its (nonzero) digits is 99574272, while the sum is 64.

The spelling of 678780673237 in words is "six hundred seventy-eight billion, seven hundred eighty million, six hundred seventy-three thousand, two hundred thirty-seven".