667520367716334 has 96 divisors (see below), whose sum is σ = 1469183419146240. Its totient is φ = 202038820984000.

The previous prime is 667520367716317. The next prime is 667520367716339. The reversal of 667520367716334 is 433617763025766.

It is a super-2 number, since 2×667520367716334² (a number of 30 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667520367716339) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8670070579 + ... + 8670147569.

It is an arithmetic number, because the mean of its divisors is an integer number (15303993949440).

Almost surely, 2^{667520367716334} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667520367716334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734591709573120).

667520367716334 is an abundant number, since it is smaller than the sum of its proper divisors (801663051429906).

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

667520367716334 is a wasteful number, since it uses less digits than its factorization.

667520367716334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91038 (or 91027 counting only the distinct ones).

The product of its (nonzero) digits is 480090240, while the sum is 66.

The spelling of 667520367716334 in words is "six hundred sixty-seven trillion, five hundred twenty billion, three hundred sixty-seven million, seven hundred sixteen thousand, three hundred thirty-four".