66992611 has 8 divisors (see below), whose sum is σ = 77612384. Its totient is φ = 56635200.

The previous prime is 66992603. The next prime is 66992617. The reversal of 66992611 is 11629966.

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 66992611 - 2³ = 66992603 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (66992617) 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, 65040 + ... + 66061.

It is an arithmetic number, because the mean of its divisors is an integer number (9701548).

Almost surely, 2^66992611 is an apocalyptic number.

66992611 is a deficient number, since it is larger than the sum of its proper divisors (10619773).

66992611 is a wasteful number, since it uses less digits than its factorization.

66992611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131181.

The product of its digits is 34992, while the sum is 40.

The square root of 66992611 is about 8184.9014044153. The cubic root of 66992611 is about 406.1398787599.

The spelling of 66992611 in words is "sixty-six million, nine hundred ninety-two thousand, six hundred eleven".