66980197 has 8 divisors (see below), whose sum is σ = 68894496. Its totient is φ = 65082192.

The previous prime is 66980191. The next prime is 66980203. The reversal of 66980197 is 79108966.

It is an interprime number because it is at equal distance from previous prime (66980191) and next prime (66980203).

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-66980197 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 (66980191) 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, 4518 + ... + 12424.

It is an arithmetic number, because the mean of its divisors is an integer number (8611812).

Almost surely, 2^66980197 is an apocalyptic number.

It is an amenable number.

66980197 is a deficient number, since it is larger than the sum of its proper divisors (1914299).

66980197 is a wasteful number, since it uses less digits than its factorization.

66980197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8147.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 66980197 is about 8184.1430217219. The cubic root of 66980197 is about 406.1147907597.

The spelling of 66980197 in words is "sixty-six million, nine hundred eighty thousand, one hundred ninety-seven".