66551454567 has 12 divisors (see below), whose sum is σ = 103524485064. Its totient is φ = 40954741200.

The previous prime is 66551454551. The next prime is 66551454589. The reversal of 66551454567 is 76545415566.

66551454567 is a `hidden beast` number, since 6 + 6 + 551 + 45 + 45 + 6 + 7 = 666.

It is not a de Polignac number, because 66551454567 - 2⁴ = 66551454551 is a prime.

It is a super-2 number, since 2×66551454567² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66551452567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284407809 + ... + 284408042.

It is an arithmetic number, because the mean of its divisors is an integer number (8627040422).

Almost surely, 2^66551454567 is an apocalyptic number.

66551454567 is a deficient number, since it is larger than the sum of its proper divisors (36973030497).

66551454567 is a wasteful number, since it uses less digits than its factorization.

66551454567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568815870 (or 568815867 counting only the distinct ones).

The product of its digits is 15120000, while the sum is 54.

The spelling of 66551454567 in words is "sixty-six billion, five hundred fifty-one million, four hundred fifty-four thousand, five hundred sixty-seven".