667123530 has 32 divisors (see below), whose sum is σ = 1619092800. Its totient is φ = 175900032.

The previous prime is 667123529. The next prime is 667123547. The reversal of 667123530 is 35321766.

It is a junction number, because it is equal to n+sod(n) for n = 667123491 and 667123500.

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, 122260 + ... + 127599.

It is an arithmetic number, because the mean of its divisors is an integer number (50596650).

Almost surely, 2^667123530 is an apocalyptic number.

667123530 is an abundant number, since it is smaller than the sum of its proper divisors (951969270).

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

667123530 is a wasteful number, since it uses less digits than its factorization.

667123530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249958.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 667123530 is about 25828.7345799209. The cubic root of 667123530 is about 873.7799726108.

The spelling of 667123530 in words is "six hundred sixty-seven million, one hundred twenty-three thousand, five hundred thirty".