66551467 has 4 divisors (see below), whose sum is σ = 66900096. Its totient is φ = 66202840.

The previous prime is 66551453. The next prime is 66551473. The reversal of 66551467 is 76415566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66551467 - 2⁷ = 66551339 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66551437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174028 + ... + 174409.

It is an arithmetic number, because the mean of its divisors is an integer number (16725024).

Almost surely, 2^66551467 is an apocalyptic number.

66551467 is a deficient number, since it is larger than the sum of its proper divisors (348629).

66551467 is a wasteful number, since it uses less digits than its factorization.

66551467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348628.

The product of its digits is 151200, while the sum is 40.

The square root of 66551467 is about 8157.9082490550. The cubic root of 66551467 is about 405.2464425003.

The spelling of 66551467 in words is "sixty-six million, five hundred fifty-one thousand, four hundred sixty-seven".