66674033661 has 8 divisors (see below), whose sum is σ = 91964184480. Its totient is φ = 42916619312.

The previous prime is 66674033639. The next prime is 66674033669. The reversal of 66674033661 is 16633047666.

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

It is a cyclic number.

It is not a de Polignac number, because 66674033661 - 2⁷ = 66674033533 is a prime.

It is a super-2 number, since 2×66674033661² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66674033661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66674033669) 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 7 ways as a sum of consecutive naturals, for example, 383184015 + ... + 383184188.

It is an arithmetic number, because the mean of its divisors is an integer number (11495523060).

Almost surely, 2^66674033661 is an apocalyptic number.

It is an amenable number.

66674033661 is a deficient number, since it is larger than the sum of its proper divisors (25290150819).

66674033661 is a wasteful number, since it uses less digits than its factorization.

66674033661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766368235.

The product of its (nonzero) digits is 1959552, while the sum is 48.

The spelling of 66674033661 in words is "sixty-six billion, six hundred seventy-four million, thirty-three thousand, six hundred sixty-one".