667550040 has 64 divisors (see below), whose sum is σ = 2007452160. Its totient is φ = 177586560.

The previous prime is 667550003. The next prime is 667550053. The reversal of 667550040 is 40055766.

It is a junction number, because it is equal to n+sod(n) for n = 667549983 and 667550010.

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, 45267 + ... + 58173.

It is an arithmetic number, because the mean of its divisors is an integer number (31366440).

Almost surely, 2^667550040 is an apocalyptic number.

667550040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667550040 is an abundant number, since it is smaller than the sum of its proper divisors (1339902120).

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

667550040 is a wasteful number, since it uses less digits than its factorization.

667550040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13352 (or 13348 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 667550040 is about 25836.9897627413. The cubic root of 667550040 is about 873.9661432809.

The spelling of 667550040 in words is "six hundred sixty-seven million, five hundred fifty thousand, forty".