66091030 has 16 divisors (see below), whose sum is σ = 119084544. Its totient is φ = 26409600.

The previous prime is 66091009. The next prime is 66091031. The reversal of 66091030 is 3019066.

66091030 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66090986 and 66091004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66091031) 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 in 7 ways as a sum of consecutive naturals, for example, 9259 + ... + 14761.

It is an arithmetic number, because the mean of its divisors is an integer number (7442784).

Almost surely, 2^66091030 is an apocalyptic number.

66091030 is a deficient number, since it is larger than the sum of its proper divisors (52993514).

66091030 is a wasteful number, since it uses less digits than its factorization.

66091030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6711.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 66091030 is about 8129.6389833744. The cubic root of 66091030 is about 404.3097116983.

The spelling of 66091030 in words is "sixty-six million, ninety-one thousand, thirty".