66270975 has 12 divisors (see below), whose sum is σ = 109568136. Its totient is φ = 35344480.

The previous prime is 66270961. The next prime is 66270977. The reversal of 66270975 is 57907266.

It is a happy number.

It is not a de Polignac number, because 66270975 - 2⁵ = 66270943 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66270977) 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, 441732 + ... + 441881.

It is an arithmetic number, because the mean of its divisors is an integer number (9130678).

Almost surely, 2^66270975 is an apocalyptic number.

66270975 is a deficient number, since it is larger than the sum of its proper divisors (43297161).

66270975 is a wasteful number, since it uses less digits than its factorization.

66270975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883626 (or 883621 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 66270975 is about 8140.6986800888. The cubic root of 66270975 is about 404.6763150658.

The spelling of 66270975 in words is "sixty-six million, two hundred seventy thousand, nine hundred seventy-five".