66677347 has 8 divisors (see below), whose sum is σ = 72999360. Its totient is φ = 60398760.

The previous prime is 66677333. The next prime is 66677353. The reversal of 66677347 is 74377666.

It is a happy number.

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 66677347 - 2¹⁵ = 66644579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66677297 and 66677306.

It is not an unprimeable number, because it can be changed into a prime (66671347) 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, 7597 + ... + 13822.

It is an arithmetic number, because the mean of its divisors is an integer number (9124920).

Almost surely, 2^66677347 is an apocalyptic number.

66677347 is a deficient number, since it is larger than the sum of its proper divisors (6322013).

66677347 is a wasteful number, since it uses less digits than its factorization.

66677347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21713.

The product of its digits is 889056, while the sum is 46.

The square root of 66677347 is about 8165.6198172582. The cubic root of 66677347 is about 405.5017851969.

The spelling of 66677347 in words is "sixty-six million, six hundred seventy-seven thousand, three hundred forty-seven".