670663203840 has 1848 divisors, whose sum is σ = 2968901822160. Its totient is φ = 144473849856.

The previous prime is 670663203839. The next prime is 670663203851. The reversal of 670663203840 is 48302366076.

670663203840 is a `hidden beast` number, since 6 + 7 + 0 + 6 + 632 + 0 + 3 + 8 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 3474938784 + ... + 3474938976.

Almost surely, 2^670663203840 is an apocalyptic number.

670663203840 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 670663203840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484450911080).

670663203840 is an abundant number, since it is smaller than the sum of its proper divisors (2298238618320).

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

670663203840 is a wasteful number, since it uses less digits than its factorization.

670663203840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

It can be divided in two parts, 670663 and 203840, that added together give a triangular number (874503 = T₁₃₂₂).

The spelling of 670663203840 in words is "six hundred seventy billion, six hundred sixty-three million, two hundred three thousand, eight hundred forty".