667603776 has 112 divisors (see below), whose sum is σ = 2027773440. Its totient is φ = 189888000.

The previous prime is 667603763. The next prime is 667603801. The reversal of 667603776 is 677306766.

It is a tau number, because it is divible by the number of its divisors (112).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336355 + ... + 338333.

It is an arithmetic number, because the mean of its divisors is an integer number (18105120).

Almost surely, 2^667603776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667603776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1013886720).

667603776 is an abundant number, since it is smaller than the sum of its proper divisors (1360169664).

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

667603776 is a wasteful number, since it uses less digits than its factorization.

667603776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252 (or 2242 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 48.

The square root of 667603776 is about 25838.0296462404. The cubic root of 667603776 is about 873.9895933005.

The spelling of 667603776 in words is "six hundred sixty-seven million, six hundred three thousand, seven hundred seventy-six".