66015959 has 8 divisors (see below), whose sum is σ = 67433520. Its totient is φ = 64613376.

The previous prime is 66015953. The next prime is 66015979. The reversal of 66015959 is 95951066.

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 66015959 - 2²⁴ = 49238743 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 (66015953) 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, 5399 + ... + 12695.

It is an arithmetic number, because the mean of its divisors is an integer number (8429190).

Almost surely, 2^66015959 is an apocalyptic number.

66015959 is a deficient number, since it is larger than the sum of its proper divisors (1417561).

66015959 is a wasteful number, since it uses less digits than its factorization.

66015959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7489.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 66015959 is about 8125.0205538202. The cubic root of 66015959 is about 404.1565722399.

The spelling of 66015959 in words is "sixty-six million, fifteen thousand, nine hundred fifty-nine".