66501855454 has 8 divisors (see below), whose sum is σ = 102072615480. Its totient is φ = 32477650296.

The previous prime is 66501855419. The next prime is 66501855463. The reversal of 66501855454 is 45455810566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66501855454² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66501855398 and 66501855407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386638609 + ... + 386638780.

It is an arithmetic number, because the mean of its divisors is an integer number (12759076935).

Almost surely, 2^66501855454 is an apocalyptic number.

66501855454 is a deficient number, since it is larger than the sum of its proper divisors (35570760026).

66501855454 is a wasteful number, since it uses less digits than its factorization.

66501855454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773277434.

The product of its (nonzero) digits is 2880000, while the sum is 49.

The spelling of 66501855454 in words is "sixty-six billion, five hundred one million, eight hundred fifty-five thousand, four hundred fifty-four".