66883511 has 4 divisors (see below), whose sum is σ = 67980024. Its totient is φ = 65787000.

The previous prime is 66883501. The next prime is 66883519. The reversal of 66883511 is 11538866.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66883511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66883519) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 548165 + ... + 548286.

It is an arithmetic number, because the mean of its divisors is an integer number (16995006).

Almost surely, 2^66883511 is an apocalyptic number.

66883511 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

66883511 is a deficient number, since it is larger than the sum of its proper divisors (1096513).

66883511 is a wasteful number, since it uses less digits than its factorization.

66883511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096512.

The product of its digits is 34560, while the sum is 38.

The square root of 66883511 is about 8178.2339780664. The cubic root of 66883511 is about 405.9192875866.

The spelling of 66883511 in words is "sixty-six million, eight hundred eighty-three thousand, five hundred eleven".