66457284554 has 16 divisors (see below), whose sum is σ = 99889588800. Its totient is φ = 33160787520.

The previous prime is 66457284547. The next prime is 66457284557. The reversal of 66457284554 is 45548275466.

It is a super-3 number, since 3×66457284554³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66457284554.

It is not an unprimeable number, because it can be changed into a prime (66457284557) 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, 6975314 + ... + 6984834.

It is an arithmetic number, because the mean of its divisors is an integer number (6243099300).

Almost surely, 2^66457284554 is an apocalyptic number.

66457284554 is a deficient number, since it is larger than the sum of its proper divisors (33432304246).

66457284554 is a wasteful number, since it uses less digits than its factorization.

66457284554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16285.

The product of its digits is 32256000, while the sum is 56.

The spelling of 66457284554 in words is "sixty-six billion, four hundred fifty-seven million, two hundred eighty-four thousand, five hundred fifty-four".