66674067400 has 24 divisors (see below), whose sum is σ = 155017207170. Its totient is φ = 26669626880.

The previous prime is 66674067373. The next prime is 66674067407. The reversal of 66674067400 is 476047666.

It can be written as a sum of positive squares in 3 ways, for example, as 62111605284 + 4562462116 = 249222^2 + 67546^2 .

It is not an unprimeable number, because it can be changed into a prime (66674067407) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 166684969 + ... + 166685368.

Almost surely, 2^66674067400 is an apocalyptic number.

It is an amenable number.

66674067400 is an abundant number, since it is smaller than the sum of its proper divisors (88343139770).

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

66674067400 is a wasteful number, since it uses less digits than its factorization.

66674067400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333370353 (or 333370344 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 46.

The spelling of 66674067400 in words is "sixty-six billion, six hundred seventy-four million, sixty-seven thousand, four hundred".