66106964554 has 16 divisors (see below), whose sum is σ = 101118458592. Its totient is φ = 32401886608.

The previous prime is 66106964543. The next prime is 66106964563. The reversal of 66106964554 is 45546960166.

It is a super-3 number, since 3×66106964554³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144844 + ... + 391399.

It is an arithmetic number, because the mean of its divisors is an integer number (6319903662).

Almost surely, 2^66106964554 is an apocalyptic number.

66106964554 is a deficient number, since it is larger than the sum of its proper divisors (35011494038).

66106964554 is a wasteful number, since it uses less digits than its factorization.

66106964554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537461.

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 66106964554 in words is "sixty-six billion, one hundred six million, nine hundred sixty-four thousand, five hundred fifty-four".