66316705 has 32 divisors (see below), whose sum is σ = 102219264. Its totient is φ = 40144896.

The previous prime is 66316697. The next prime is 66316753. The reversal of 66316705 is 50761366.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66316705 - 2³ = 66316697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7297 + ... + 13633.

It is an arithmetic number, because the mean of its divisors is an integer number (3194352).

Almost surely, 2^66316705 is an apocalyptic number.

66316705 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66316705 is a deficient number, since it is larger than the sum of its proper divisors (35902559).

66316705 is a wasteful number, since it uses less digits than its factorization.

66316705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6385.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 66316705 is about 8143.5069226961. The cubic root of 66316705 is about 404.7693753781.

The spelling of 66316705 in words is "sixty-six million, three hundred sixteen thousand, seven hundred five".