667726411530 has 32 divisors (see below), whose sum is σ = 1672219188864. Its totient is φ = 170318620736.

The previous prime is 667726411511. The next prime is 667726411549. The reversal of 667726411530 is 35114627766.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (667726411511) and next prime (667726411549).

It is a self number, because there is not a number n which added to its sum of digits gives 667726411530.

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, 483859029 + ... + 483860408.

It is an arithmetic number, because the mean of its divisors is an integer number (52256849652).

Almost surely, 2^667726411530 is an apocalyptic number.

667726411530 is an abundant number, since it is smaller than the sum of its proper divisors (1004492777334).

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

667726411530 is a wasteful number, since it uses less digits than its factorization.

667726411530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967719470.

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 667726411530 in words is "six hundred sixty-seven billion, seven hundred twenty-six million, four hundred eleven thousand, five hundred thirty".