66674015 has 8 divisors (see below), whose sum is σ = 80186640. Its totient is φ = 53220672.

The previous prime is 66674011. The next prime is 66674107. The reversal of 66674015 is 51047666.

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 66674015 - 2² = 66674011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66674011) 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, 12305 + ... + 16874.

It is an arithmetic number, because the mean of its divisors is an integer number (10023330).

Almost surely, 2^66674015 is an apocalyptic number.

66674015 is a deficient number, since it is larger than the sum of its proper divisors (13512625).

66674015 is a wasteful number, since it uses less digits than its factorization.

66674015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29641.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66674015 is about 8165.4157885560. The cubic root of 66674015 is about 405.4950305068.

The spelling of 66674015 in words is "sixty-six million, six hundred seventy-four thousand, fifteen".