66154541334 has 32 divisors (see below), whose sum is σ = 151748522496. Its totient is φ = 18834029760.

The previous prime is 66154541333. The next prime is 66154541393. The reversal of 66154541334 is 43314545166.

It is a happy number.

It is a super-2 number, since 2×66154541334² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66154541333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2790882 + ... + 2814485.

It is an arithmetic number, because the mean of its divisors is an integer number (4742141328).

Almost surely, 2^66154541334 is an apocalyptic number.

66154541334 is an abundant number, since it is smaller than the sum of its proper divisors (85593981162).

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

66154541334 is a wasteful number, since it uses less digits than its factorization.

66154541334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5605660.

The product of its digits is 518400, while the sum is 42.

The spelling of 66154541334 in words is "sixty-six billion, one hundred fifty-four million, five hundred forty-one thousand, three hundred thirty-four".