66970977 has 8 divisors (see below), whose sum is σ = 89399520. Its totient is φ = 44594880.

The previous prime is 66970961. The next prime is 66971053. The reversal of 66970977 is 77907966.

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

It is not a de Polignac number, because 66970977 - 2⁴ = 66970961 is a prime.

It is a super-2 number, since 2×66970977² = 8970223520669058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66970577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10027 + ... + 15312.

It is an arithmetic number, because the mean of its divisors is an integer number (11174940).

Almost surely, 2^66970977 is an apocalyptic number.

It is an amenable number.

66970977 is a deficient number, since it is larger than the sum of its proper divisors (22428543).

66970977 is a wasteful number, since it uses less digits than its factorization.

66970977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26223.

The product of its (nonzero) digits is 1000188, while the sum is 51.

The square root of 66970977 is about 8183.5797179474. The cubic root of 66970977 is about 406.0961556488.

The spelling of 66970977 in words is "sixty-six million, nine hundred seventy thousand, nine hundred seventy-seven".