668400670034 has 8 divisors (see below), whose sum is σ = 1002605713788. Its totient is φ = 334198765440.

The previous prime is 668400670033. The next prime is 668400670081. The reversal of 668400670034 is 430076004866.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 514268265625 + 154132404409 = 717125^2 + 392597^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×668400670034² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (668400670033) 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, 149687 + ... + 1165850.

Almost surely, 2^668400670034 is an apocalyptic number.

668400670034 is a deficient number, since it is larger than the sum of its proper divisors (334205043754).

668400670034 is a wasteful number, since it uses less digits than its factorization.

668400670034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569580.

The product of its (nonzero) digits is 580608, while the sum is 44.

The spelling of 668400670034 in words is "six hundred sixty-eight billion, four hundred million, six hundred seventy thousand, thirty-four".