66349556 has 24 divisors (see below), whose sum is σ = 142907520. Its totient is φ = 26248032.

The previous prime is 66349553. The next prime is 66349561. The reversal of 66349556 is 65594366.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66349553) 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, 90776 + ... + 91503.

It is an arithmetic number, because the mean of its divisors is an integer number (5954480).

Almost surely, 2^66349556 is an apocalyptic number.

It is an amenable number.

66349556 is an abundant number, since it is smaller than the sum of its proper divisors (76557964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66349556 is a wasteful number, since it uses less digits than its factorization.

66349556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182303 (or 182301 counting only the distinct ones).

The product of its digits is 583200, while the sum is 44.

The square root of 66349556 is about 8145.5236786839. The cubic root of 66349556 is about 404.8362005907.

The spelling of 66349556 in words is "sixty-six million, three hundred forty-nine thousand, five hundred fifty-six".