66726146 has 4 divisors (see below), whose sum is σ = 100089222. Its totient is φ = 33363072.

The previous prime is 66726103. The next prime is 66726199. The reversal of 66726146 is 64162766.

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., 35868121 + 30858025 = 5989^2 + 5555^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16681535 + ... + 16681538.

Almost surely, 2^66726146 is an apocalyptic number.

66726146 is a deficient number, since it is larger than the sum of its proper divisors (33363076).

66726146 is a wasteful number, since it uses less digits than its factorization.

66726146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33363075.

The product of its digits is 72576, while the sum is 38.

The square root of 66726146 is about 8168.6073476450. The cubic root of 66726146 is about 405.6006856334.

The spelling of 66726146 in words is "sixty-six million, seven hundred twenty-six thousand, one hundred forty-six".