66976875 has 120 divisors (see below), whose sum is σ = 146015760. Its totient is φ = 30618000.

The previous prime is 66976867. The next prime is 66976909. The reversal of 66976875 is 57867966.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 66976875 - 2³ = 66976867 is a prime.

Its product of digits (3810240) is a multiple of the sum of its prime divisors (15).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 9568122 + ... + 9568128.

It is an arithmetic number, because the mean of its divisors is an integer number (1216798).

Almost surely, 2^66976875 is an apocalyptic number.

66976875 is an abundant number, since it is smaller than the sum of its proper divisors (79038885).

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

66976875 is an frugal number, since it uses more digits than its factorization.

66976875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 15 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 66976875 is about 8183.9400657629. The cubic root of 66976875 is about 406.1080766576.

The spelling of 66976875 in words is "sixty-six million, nine hundred seventy-six thousand, eight hundred seventy-five".