668400038354 has 8 divisors (see below), whose sum is σ = 1005865856688. Its totient is φ = 333111419460.

The previous prime is 668400038309. The next prime is 668400038381. The reversal of 668400038354 is 453830004866.

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

It is a super-2 number, since 2×668400038354² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 668400038299 and 668400038308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544299092 + ... + 544300319.

It is an arithmetic number, because the mean of its divisors is an integer number (125733232086).

Almost surely, 2^668400038354 is an apocalyptic number.

668400038354 is a deficient number, since it is larger than the sum of its proper divisors (337465818334).

668400038354 is a wasteful number, since it uses less digits than its factorization.

668400038354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088599720.

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 668400038354 in words is "six hundred sixty-eight billion, four hundred million, thirty-eight thousand, three hundred fifty-four".