66680154 has 24 divisors (see below), whose sum is σ = 152972820. Its totient is φ = 20919168.

The previous prime is 66680113. The next prime is 66680161. The reversal of 66680154 is 45108666.

It can be written as a sum of positive squares in 2 ways, for example, as 66048129 + 632025 = 8127^2 + 795^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108649 + ... + 109260.

Almost surely, 2^66680154 is an apocalyptic number.

66680154 is an abundant number, since it is smaller than the sum of its proper divisors (86292666).

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

66680154 is a wasteful number, since it uses less digits than its factorization.

66680154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217934 (or 217931 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 66680154 is about 8165.7916946246. The cubic root of 66680154 is about 405.5074754230.

The spelling of 66680154 in words is "sixty-six million, six hundred eighty thousand, one hundred fifty-four".