66700403672 has 48 divisors (see below), whose sum is σ = 145709257320. Its totient is φ = 28541184000.

The previous prime is 66700403663. The next prime is 66700403677. The reversal of 66700403672 is 27630400766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66700403677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118547 + ... + 383997.

Almost surely, 2^66700403672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66700403672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72854628660).

66700403672 is an abundant number, since it is smaller than the sum of its proper divisors (79008853648).

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

66700403672 is a wasteful number, since it uses less digits than its factorization.

66700403672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266112 (or 266101 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 41.

The spelling of 66700403672 in words is "sixty-six billion, seven hundred million, four hundred three thousand, six hundred seventy-two".