670985763840 has 1056 divisors, whose sum is σ = 2795815526400. Its totient is φ = 145475371008.

The previous prime is 670985763797. The next prime is 670985763937. The reversal of 670985763840 is 48367589076.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1105412817 + ... + 1105413423.

Almost surely, 2^670985763840 is an apocalyptic number.

670985763840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670985763840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1397907763200).

670985763840 is an abundant number, since it is smaller than the sum of its proper divisors (2124829762560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

670985763840 is a wasteful number, since it uses less digits than its factorization.

670985763840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 63.

The spelling of 670985763840 in words is "six hundred seventy billion, nine hundred eighty-five million, seven hundred sixty-three thousand, eight hundred forty".