66674740140 has 60 divisors (see below), whose sum is σ = 209161134336. Its totient is φ = 17779930272.

The previous prime is 66674740091. The next prime is 66674740157. The reversal of 66674740140 is 4104747666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20577004 + ... + 20580243.

Almost surely, 2^66674740140 is an apocalyptic number.

66674740140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66674740140 is an abundant number, since it is smaller than the sum of its proper divisors (142486394196).

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

66674740140 is a wasteful number, since it uses less digits than its factorization.

66674740140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41157268 (or 41157257 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 66674740140 in words is "sixty-six billion, six hundred seventy-four million, seven hundred forty thousand, one hundred forty".