66741699 has 16 divisors (see below), whose sum is σ = 97747200. Its totient is φ = 40319136.

The previous prime is 66741683. The next prime is 66741721. The reversal of 66741699 is 99614766.

It is not a de Polignac number, because 66741699 - 2⁴ = 66741683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66741629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24144 + ... + 26765.

It is an arithmetic number, because the mean of its divisors is an integer number (6109200).

Almost surely, 2^66741699 is an apocalyptic number.

66741699 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

66741699 is a deficient number, since it is larger than the sum of its proper divisors (31005501).

66741699 is a wasteful number, since it uses less digits than its factorization.

66741699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50954.

The product of its digits is 489888, while the sum is 48.

The square root of 66741699 is about 8169.5592904391. The cubic root of 66741699 is about 405.6321966066.

The spelling of 66741699 in words is "sixty-six million, seven hundred forty-one thousand, six hundred ninety-nine".