66820674 has 8 divisors (see below), whose sum is σ = 133641360. Its totient is φ = 22273556.

The previous prime is 66820657. The next prime is 66820679. The reversal of 66820674 is 47602866.

It is a sphenic number, since it is the product of 3 distinct primes.

66820674 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (66820679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5568384 + ... + 5568395.

It is an arithmetic number, because the mean of its divisors is an integer number (16705170).

Almost surely, 2^66820674 is an apocalyptic number.

66820674 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66820674 is a wasteful number, since it uses less digits than its factorization.

66820674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11136784.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 66820674 is about 8174.3913534893. The cubic root of 66820674 is about 405.7921274843.

The spelling of 66820674 in words is "sixty-six million, eight hundred twenty thousand, six hundred seventy-four".