66158475 has 48 divisors (see below), whose sum is σ = 121956480. Its totient is φ = 31449600.

The previous prime is 66158459. The next prime is 66158507. The reversal of 66158475 is 57485166.

It is not a de Polignac number, because 66158475 - 2⁴ = 66158459 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22860 + ... + 25590.

It is an arithmetic number, because the mean of its divisors is an integer number (2540760).

Almost surely, 2^66158475 is an apocalyptic number.

66158475 is a deficient number, since it is larger than the sum of its proper divisors (55798005).

66158475 is a wasteful number, since it uses less digits than its factorization.

66158475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780 (or 2775 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 66158475 is about 8133.7860188230. The cubic root of 66158475 is about 404.4471958016.

The spelling of 66158475 in words is "sixty-six million, one hundred fifty-eight thousand, four hundred seventy-five".