66795975 has 48 divisors (see below), whose sum is σ = 129947040. Its totient is φ = 33523200.

The previous prime is 66795973. The next prime is 66796003. The reversal of 66795975 is 57959766.

It is not a de Polignac number, because 66795975 - 2¹ = 66795973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66795973) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8565 + ... + 14385.

It is an arithmetic number, because the mean of its divisors is an integer number (2707230).

Almost surely, 2^66795975 is an apocalyptic number.

66795975 is a deficient number, since it is larger than the sum of its proper divisors (63151065).

66795975 is a wasteful number, since it uses less digits than its factorization.

66795975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5857 (or 5846 counting only the distinct ones).

The product of its digits is 3572100, while the sum is 54.

The square root of 66795975 is about 8172.8804591772. The cubic root of 66795975 is about 405.7421235244.

The spelling of 66795975 in words is "sixty-six million, seven hundred ninety-five thousand, nine hundred seventy-five".