66214507 has 8 divisors (see below), whose sum is σ = 70307136. Its totient is φ = 62143872.

The previous prime is 66214501. The next prime is 66214513. The reversal of 66214507 is 70541266.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66214501) and next prime (66214513).

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 66214507 - 2¹¹ = 66212459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66214501) 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, 933 + ... + 11545.

It is an arithmetic number, because the mean of its divisors is an integer number (8788392).

Almost surely, 2^66214507 is an apocalyptic number.

66214507 is a deficient number, since it is larger than the sum of its proper divisors (4092629).

66214507 is a wasteful number, since it uses less digits than its factorization.

66214507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10997.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 66214507 is about 8137.2296882907. The cubic root of 66214507 is about 404.5613438909.

The spelling of 66214507 in words is "sixty-six million, two hundred fourteen thousand, five hundred seven".