66519692 has 6 divisors (see below), whose sum is σ = 116409468. Its totient is φ = 33259844.

The previous prime is 66519689. The next prime is 66519697. The reversal of 66519692 is 29691566.

66519692 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66519697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8314958 + ... + 8314965.

It is an arithmetic number, because the mean of its divisors is an integer number (19401578).

Almost surely, 2^66519692 is an apocalyptic number.

It is an amenable number.

66519692 is a deficient number, since it is larger than the sum of its proper divisors (49889776).

66519692 is a wasteful number, since it uses less digits than its factorization.

66519692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16629927 (or 16629925 counting only the distinct ones).

The product of its digits is 174960, while the sum is 44.

The square root of 66519692 is about 8155.9605197671. The cubic root of 66519692 is about 405.1819372577.

The spelling of 66519692 in words is "sixty-six million, five hundred nineteen thousand, six hundred ninety-two".