668126064 has 40 divisors (see below), whose sum is σ = 1727809552. Its totient is φ = 222474240.

The previous prime is 668126033. The next prime is 668126101. The reversal of 668126064 is 460621866.

It is a super-2 number, since 2×668126064² = 892784874792264192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42192 + ... + 55824.

Almost surely, 2^668126064 is an apocalyptic number.

It is an amenable number.

668126064 is an abundant number, since it is smaller than the sum of its proper divisors (1059683488).

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

668126064 is a wasteful number, since it uses less digits than its factorization.

668126064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14665 (or 14659 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 668126064 is about 25848.1346328899. The cubic root of 668126064 is about 874.2174506547.

The spelling of 668126064 in words is "six hundred sixty-eight million, one hundred twenty-six thousand, sixty-four".