673688064 has 120 divisors (see below), whose sum is σ = 2088000288. Its totient is φ = 192460800.

The previous prime is 673688051. The next prime is 673688107. The reversal of 673688064 is 460886376.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70789 + ... + 79739.

Almost surely, 2^673688064 is an apocalyptic number.

673688064 is a gapful number since it is divisible by the number (64) 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 673688064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1044000144).

673688064 is an abundant number, since it is smaller than the sum of its proper divisors (1414312224).

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

673688064 is an equidigital number, since it uses as much as digits as its factorization.

673688064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8986 (or 8963 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 673688064 is about 25955.5016133382. The cubic root of 673688064 is about 876.6366381852.

The spelling of 673688064 in words is "six hundred seventy-three million, six hundred eighty-eight thousand, sixty-four".