673618680 has 240 divisors, whose sum is σ = 2634378120. Its totient is φ = 153933696.

The previous prime is 673618667. The next prime is 673618691. The reversal of 673618680 is 86816376.

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 59 ways as a sum of consecutive naturals, for example, 156639 + ... + 160881.

Almost surely, 2^673618680 is an apocalyptic number.

673618680 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 673618680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1317189060).

673618680 is an abundant number, since it is smaller than the sum of its proper divisors (1960759440).

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

673618680 is a wasteful number, since it uses less digits than its factorization.

673618680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280 (or 4260 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 673618680 is about 25954.1649836784. The cubic root of 673618680 is about 876.6065418404.

The spelling of 673618680 in words is "six hundred seventy-three million, six hundred eighteen thousand, six hundred eighty".