66349959 has 16 divisors (see below), whose sum is σ = 95501952. Its totient is φ = 40732128.

The previous prime is 66349949. The next prime is 66349961. The reversal of 66349959 is 95994366.

It is a happy number.

It is not a de Polignac number, because 66349959 - 2⁷ = 66349831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66349909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16392 + ... + 20034.

It is an arithmetic number, because the mean of its divisors is an integer number (5968872).

Almost surely, 2^66349959 is an apocalyptic number.

66349959 is a deficient number, since it is larger than the sum of its proper divisors (29151993).

66349959 is a wasteful number, since it uses less digits than its factorization.

66349959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4126.

The product of its digits is 1574640, while the sum is 51.

The square root of 66349959 is about 8145.5484161596. The cubic root of 66349959 is about 404.8370202327.

The spelling of 66349959 in words is "sixty-six million, three hundred forty-nine thousand, nine hundred fifty-nine".