66545515614064 has 40 divisors (see below), whose sum is σ = 134794915466112. Its totient is φ = 31765263076800.

The previous prime is 66545515614043. The next prime is 66545515614101. The reversal of 66545515614064 is 46041651554566.

It is a super-3 number, since 3×66545515614064³ (a number of 42 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 172685362 + ... + 173070289.

Almost surely, 2^{66545515614064} is an apocalyptic number.

It is an amenable number.

66545515614064 is an abundant number, since it is smaller than the sum of its proper divisors (68249399852048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66545515614064 is a wasteful number, since it uses less digits than its factorization.

66545515614064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345756205 (or 345756199 counting only the distinct ones).

The product of its (nonzero) digits is 51840000, while the sum is 58.

The spelling of 66545515614064 in words is "sixty-six trillion, five hundred forty-five billion, five hundred fifteen million, six hundred fourteen thousand, sixty-four".