66726071 has 8 divisors (see below), whose sum is σ = 73087920. Its totient is φ = 60635008.

The previous prime is 66726053. The next prime is 66726073. The reversal of 66726071 is 17062766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66726071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66726073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67181 + ... + 68166.

It is an arithmetic number, because the mean of its divisors is an integer number (9135990).

Almost surely, 2^66726071 is an apocalyptic number.

66726071 is a deficient number, since it is larger than the sum of its proper divisors (6361849).

66726071 is a wasteful number, since it uses less digits than its factorization.

66726071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135393.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 66726071 is about 8168.6027568979. The cubic root of 66726071 is about 405.6005336686.

The spelling of 66726071 in words is "sixty-six million, seven hundred twenty-six thousand, seventy-one".