66371516 has 6 divisors (see below), whose sum is σ = 116150160. Its totient is φ = 33185756.

The previous prime is 66371509. The next prime is 66371533. The reversal of 66371516 is 61517366.

It is a happy number.

It is a super-4 number, since 4×66371516⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8296436 + ... + 8296443.

It is an arithmetic number, because the mean of its divisors is an integer number (19358360).

Almost surely, 2^66371516 is an apocalyptic number.

It is an amenable number.

66371516 is a deficient number, since it is larger than the sum of its proper divisors (49778644).

66371516 is a wasteful number, since it uses less digits than its factorization.

66371516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16592883 (or 16592881 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 66371516 is about 8146.8715467964. The cubic root of 66371516 is about 404.8808591278.

The spelling of 66371516 in words is "sixty-six million, three hundred seventy-one thousand, five hundred sixteen".