66071862 has 80 divisors (see below), whose sum is σ = 155154912. Its totient is φ = 20995200.

The previous prime is 66071857. The next prime is 66071921. The reversal of 66071862 is 26817066.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 437487 + ... + 437637.

Almost surely, 2^66071862 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66071862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77577456).

66071862 is an abundant number, since it is smaller than the sum of its proper divisors (89083050).

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

66071862 is a wasteful number, since it uses less digits than its factorization.

66071862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 66071862 is about 8128.4600017469. The cubic root of 66071862 is about 404.2706213815.

The spelling of 66071862 in words is "sixty-six million, seventy-one thousand, eight hundred sixty-two".