66875004 has 72 divisors (see below), whose sum is σ = 201702480. Its totient is φ = 19105632.

The previous prime is 66874993. The next prime is 66875023. The reversal of 66875004 is 40057866.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 66875004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1027 + ... + 11610.

Almost surely, 2^66875004 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 66875004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100851240).

66875004 is an abundant number, since it is smaller than the sum of its proper divisors (134827476).

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

66875004 is a wasteful number, since it uses less digits than its factorization.

66875004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12664 (or 12649 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 66875004 is about 8177.7138614652. The cubic root of 66875004 is about 405.9020770577.

The spelling of 66875004 in words is "sixty-six million, eight hundred seventy-five thousand, four".