66426672 has 40 divisors (see below), whose sum is σ = 184804144. Its totient is φ = 20438784.

The previous prime is 66426653. The next prime is 66426673. The reversal of 66426672 is 27662466.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 66426672.

It is not an unprimeable number, because it can be changed into a prime (66426673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52603 + ... + 53850.

Almost surely, 2^66426672 is an apocalyptic number.

It is an amenable number.

66426672 is an abundant number, since it is smaller than the sum of its proper divisors (118377472).

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

66426672 is a wasteful number, since it uses less digits than its factorization.

66426672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106477 (or 106471 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

The square root of 66426672 is about 8150.2559469013. The cubic root of 66426672 is about 404.9929826554.

The spelling of 66426672 in words is "sixty-six million, four hundred twenty-six thousand, six hundred seventy-two".