667705220316 has 18 divisors (see below), whose sum is σ = 1687810418112. Its totient is φ = 222568406760.

The previous prime is 667705220311. The next prime is 667705220431. The reversal of 667705220316 is 613022507766.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×667705220316² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667705220311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9273683580 + ... + 9273683651.

Almost surely, 2^667705220316 is an apocalyptic number.

It is an amenable number.

667705220316 is an abundant number, since it is smaller than the sum of its proper divisors (1020105197796).

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

667705220316 is a wasteful number, since it uses less digits than its factorization.

667705220316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18547367241 (or 18547367236 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 667705220316 in words is "six hundred sixty-seven billion, seven hundred five million, two hundred twenty thousand, three hundred sixteen".