667420453623 has 32 divisors (see below), whose sum is σ = 1111156895232. Its totient is φ = 346187318400.

The previous prime is 667420453589. The next prime is 667420453649. The reversal of 667420453623 is 326354024766.

It is not a de Polignac number, because 667420453623 - 2⁸ = 667420453367 is a prime.

It is a super-2 number, since 2×667420453623² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667420451623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2032836 + ... + 2338217.

It is an arithmetic number, because the mean of its divisors is an integer number (34723652976).

Almost surely, 2^667420453623 is an apocalyptic number.

667420453623 is a deficient number, since it is larger than the sum of its proper divisors (443736441609).

667420453623 is a wasteful number, since it uses less digits than its factorization.

667420453623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4371735.

The product of its (nonzero) digits is 4354560, while the sum is 48.

The spelling of 667420453623 in words is "six hundred sixty-seven billion, four hundred twenty million, four hundred fifty-three thousand, six hundred twenty-three".