66700061 has 8 divisors (see below), whose sum is σ = 70709184. Its totient is φ = 62700480.

The previous prime is 66700057. The next prime is 66700079. The reversal of 66700061 is 16000766.

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

It is a cyclic number.

It is not a de Polignac number, because 66700061 - 2² = 66700057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66700061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66700001) 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, 16226 + ... + 19916.

It is an arithmetic number, because the mean of its divisors is an integer number (8838648).

Almost surely, 2^66700061 is an apocalyptic number.

It is an amenable number.

66700061 is a deficient number, since it is larger than the sum of its proper divisors (4009123).

66700061 is a wasteful number, since it uses less digits than its factorization.

66700061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4771.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 66700061 is about 8167.0105301757. The cubic root of 66700061 is about 405.5478254304.

The spelling of 66700061 in words is "sixty-six million, seven hundred thousand, sixty-one".