66554013 has 8 divisors (see below), whose sum is σ = 88776576. Its totient is φ = 44350400.

The previous prime is 66553999. The next prime is 66554039. The reversal of 66554013 is 31045566.

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 66554013 - 2⁸ = 66553757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66554053) 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, 10108 + ... + 15338.

It is an arithmetic number, because the mean of its divisors is an integer number (11097072).

Almost surely, 2^66554013 is an apocalyptic number.

It is an amenable number.

66554013 is a deficient number, since it is larger than the sum of its proper divisors (22222563).

66554013 is a wasteful number, since it uses less digits than its factorization.

66554013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9475.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 66554013 is about 8158.0642924655. The cubic root of 66554013 is about 405.2516101514.

Adding to 66554013 its reverse (31045566), we get a palindrome (97599579).

The spelling of 66554013 in words is "sixty-six million, five hundred fifty-four thousand, thirteen".