66522454 has 4 divisors (see below), whose sum is σ = 99783684. Its totient is φ = 33261226.

The previous prime is 66522413. The next prime is 66522457. The reversal of 66522454 is 45422566.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66522457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16630612 + ... + 16630615.

It is an arithmetic number, because the mean of its divisors is an integer number (24945921).

Almost surely, 2^66522454 is an apocalyptic number.

66522454 is a deficient number, since it is larger than the sum of its proper divisors (33261230).

66522454 is a wasteful number, since it uses less digits than its factorization.

66522454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33261229.

The product of its digits is 57600, while the sum is 34.

The square root of 66522454 is about 8156.1298420268. The cubic root of 66522454 is about 405.1875451059.

The spelling of 66522454 in words is "sixty-six million, five hundred twenty-two thousand, four hundred fifty-four".