66964999 has 8 divisors (see below), whose sum is σ = 68100480. Its totient is φ = 65835000.

The previous prime is 66964993. The next prime is 66965011. The reversal of 66964999 is 99946966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66964999 - 2⁵ = 66964967 is a prime.

It is a super-2 number, since 2×66964999² = 8968622182140002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66964993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28624 + ... + 30874.

It is an arithmetic number, because the mean of its divisors is an integer number (8512560).

Almost surely, 2^66964999 is an apocalyptic number.

66964999 is a deficient number, since it is larger than the sum of its proper divisors (1135481).

66964999 is a wasteful number, since it uses less digits than its factorization.

66964999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741.

The product of its digits is 5668704, while the sum is 58.

The square root of 66964999 is about 8183.2144662107. The cubic root of 66964999 is about 406.0840722302.

The spelling of 66964999 in words is "sixty-six million, nine hundred sixty-four thousand, nine hundred ninety-nine".