667406700340 has 12 divisors (see below), whose sum is σ = 1401554070756. Its totient is φ = 266962680128.

The previous prime is 667406700319. The next prime is 667406700343. The reversal of 667406700340 is 43007604766.

It can be written as a sum of positive squares in 2 ways, for example, as 314813010724 + 352593689616 = 561082^2 + 593796^2 .

It is a super-3 number, since 3×667406700340³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667406700343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16685167489 + ... + 16685167528.

It is an arithmetic number, because the mean of its divisors is an integer number (116796172563).

Almost surely, 2^667406700340 is an apocalyptic number.

It is an amenable number.

667406700340 is an abundant number, since it is smaller than the sum of its proper divisors (734147370416).

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

667406700340 is a wasteful number, since it uses less digits than its factorization.

667406700340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33370335026 (or 33370335024 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 43.

The spelling of 667406700340 in words is "six hundred sixty-seven billion, four hundred six million, seven hundred thousand, three hundred forty".