66071458 has 4 divisors (see below), whose sum is σ = 99107190. Its totient is φ = 33035728.

The previous prime is 66071431. The next prime is 66071461. The reversal of 66071458 is 85417066.

66071458 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 57562569 + 8508889 = 7587^2 + 2917^2 .

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 as a sum of consecutive naturals, namely, 16517863 + ... + 16517866.

Almost surely, 2^66071458 is an apocalyptic number.

66071458 is a deficient number, since it is larger than the sum of its proper divisors (33035732).

66071458 is a wasteful number, since it uses less digits than its factorization.

66071458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33035731.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 66071458 is about 8128.4351507532. The cubic root of 66071458 is about 404.2697974016.

The spelling of 66071458 in words is "sixty-six million, seventy-one thousand, four hundred fifty-eight".