66913833 has 8 divisors (see below), whose sum is σ = 101963968. Its totient is φ = 38236464.

The previous prime is 66913829. The next prime is 66913843. The reversal of 66913833 is 33831966.

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

It is not a de Polignac number, because 66913833 - 2² = 66913829 is a prime.

It is a super-2 number, since 2×66913833² = 8954922093503778, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66913791 and 66913800.

It is not an unprimeable number, because it can be changed into a prime (66913823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1593166 + ... + 1593207.

It is an arithmetic number, because the mean of its divisors is an integer number (12745496).

Almost surely, 2^66913833 is an apocalyptic number.

It is an amenable number.

66913833 is a deficient number, since it is larger than the sum of its proper divisors (35050135).

66913833 is a wasteful number, since it uses less digits than its factorization.

66913833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3186383.

The product of its digits is 69984, while the sum is 39.

The square root of 66913833 is about 8180.0875912181. The cubic root of 66913833 is about 405.9806202176.

The spelling of 66913833 in words is "sixty-six million, nine hundred thirteen thousand, eight hundred thirty-three".