66397058 has 72 divisors (see below), whose sum is σ = 132682320. Its totient is φ = 24766560.

The previous prime is 66397049. The next prime is 66397061. The reversal of 66397058 is 85079366.

66397058 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66397058² = 8817138622110728, which contains 22 as substring.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 314573 + ... + 314783.

It is an arithmetic number, because the mean of its divisors is an integer number (1842810).

Almost surely, 2^66397058 is an apocalyptic number.

66397058 is a deficient number, since it is larger than the sum of its proper divisors (66285262).

66397058 is a wasteful number, since it uses less digits than its factorization.

66397058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 66397058 is about 8148.4389916106. The cubic root of 66397058 is about 404.9327897412.

The spelling of 66397058 in words is "sixty-six million, three hundred ninety-seven thousand, fifty-eight".