66163475 has 18 divisors (see below), whose sum is σ = 95439204. Its totient is φ = 45368400.

The previous prime is 66163469. The next prime is 66163499. The reversal of 66163475 is 57436166.

It is a happy number.

It is not a de Polignac number, because 66163475 - 2⁴ = 66163459 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 25781 + ... + 28230.

It is an arithmetic number, because the mean of its divisors is an integer number (5302178).

Almost surely, 2^66163475 is an apocalyptic number.

66163475 is a deficient number, since it is larger than the sum of its proper divisors (29275729).

66163475 is a wasteful number, since it uses less digits than its factorization.

66163475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54035 (or 54023 counting only the distinct ones).

The product of its digits is 90720, while the sum is 38.

The square root of 66163475 is about 8134.0933729580. The cubic root of 66163475 is about 404.4573843931.

The spelling of 66163475 in words is "sixty-six million, one hundred sixty-three thousand, four hundred seventy-five".