667376424 has 192 divisors, whose sum is σ = 2165304960. Its totient is φ = 183006720.

The previous prime is 667376407. The next prime is 667376431. The reversal of 667376424 is 424673766.

It is a super-2 number, since 2×667376424² = 890782582622055552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 667376424.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 545077 + ... + 546299.

It is an arithmetic number, because the mean of its divisors is an integer number (11277630).

Almost surely, 2^667376424 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 667376424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1082652480).

667376424 is an abundant number, since it is smaller than the sum of its proper divisors (1497928536).

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

667376424 is a wasteful number, since it uses less digits than its factorization.

667376424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312 (or 1305 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 45.

The square root of 667376424 is about 25833.6297101278. The cubic root of 667376424 is about 873.8903698541.

The spelling of 667376424 in words is "six hundred sixty-seven million, three hundred seventy-six thousand, four hundred twenty-four".