66722735 has 8 divisors (see below), whose sum is σ = 80149776. Its totient is φ = 53323200.

The previous prime is 66722731. The next prime is 66722743. The reversal of 66722735 is 53722766.

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

It is not a de Polignac number, because 66722735 - 2² = 66722731 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 (66722731) 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, 1094 + ... + 11603.

It is an arithmetic number, because the mean of its divisors is an integer number (10018722).

Almost surely, 2^66722735 is an apocalyptic number.

66722735 is a deficient number, since it is larger than the sum of its proper divisors (13427041).

66722735 is a wasteful number, since it uses less digits than its factorization.

66722735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13753.

The product of its digits is 105840, while the sum is 38.

The square root of 66722735 is about 8168.3985578570. The cubic root of 66722735 is about 405.5937741621.

The spelling of 66722735 in words is "sixty-six million, seven hundred twenty-two thousand, seven hundred thirty-five".