66670367 has 4 divisors (see below), whose sum is σ = 68821056. Its totient is φ = 64519680.

The previous prime is 66670327. The next prime is 66670421. The reversal of 66670367 is 76307666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76307666 = 2 ⋅38153833.

It is a de Polignac number, because none of the positive numbers 2^k-66670367 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 (66670327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1075298 + ... + 1075359.

It is an arithmetic number, because the mean of its divisors is an integer number (17205264).

Almost surely, 2^66670367 is an apocalyptic number.

66670367 is a deficient number, since it is larger than the sum of its proper divisors (2150689).

66670367 is a wasteful number, since it uses less digits than its factorization.

66670367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150688.

The product of its (nonzero) digits is 190512, while the sum is 41.

The square root of 66670367 is about 8165.1924043466. The cubic root of 66670367 is about 405.4876349577.

The spelling of 66670367 in words is "sixty-six million, six hundred seventy thousand, three hundred sixty-seven".