667452254766 has 64 divisors (see below), whose sum is σ = 1480550400000. Its totient is φ = 198911408000.

The previous prime is 667452254731. The next prime is 667452254813.

667452254766 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 657235 + ... + 1329233.

It is an arithmetic number, because the mean of its divisors is an integer number (23133600000).

Almost surely, 2^667452254766 is an apocalyptic number.

667452254766 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 667452254766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (740275200000).

667452254766 is an abundant number, since it is smaller than the sum of its proper divisors (813098145234).

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

667452254766 is a wasteful number, since it uses less digits than its factorization.

667452254766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672265.

The product of its digits is 101606400, while the sum is 60.

The spelling of 667452254766 in words is "six hundred sixty-seven billion, four hundred fifty-two million, two hundred fifty-four thousand, seven hundred sixty-six".