66870777 has 8 divisors (see below), whose sum is σ = 90672480. Its totient is φ = 43824800.

The previous prime is 66870761. The next prime is 66870799. The reversal of 66870777 is 77707866.

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 66870777 - 2⁴ = 66870761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66870077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188724 + ... + 189077.

It is an arithmetic number, because the mean of its divisors is an integer number (11334060).

Almost surely, 2^66870777 is an apocalyptic number.

It is an amenable number.

66870777 is a deficient number, since it is larger than the sum of its proper divisors (23801703).

66870777 is a wasteful number, since it uses less digits than its factorization.

66870777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377863.

The product of its (nonzero) digits is 691488, while the sum is 48.

The square root of 66870777 is about 8177.4554110677. The cubic root of 66870777 is about 405.8935248627.

The spelling of 66870777 in words is "sixty-six million, eight hundred seventy thousand, seven hundred seventy-seven".