670166881 has 8 divisors (see below), whose sum is σ = 674941824. Its totient is φ = 665402640.

The previous prime is 670166867. The next prime is 670166891. The reversal of 670166881 is 188661076.

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 670166881 - 2⁹ = 670166369 is a prime.

It is a super-2 number, since 2×670166881² = 898247296778536322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670166851) 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, 154776 + ... + 159046.

It is an arithmetic number, because the mean of its divisors is an integer number (84367728).

Almost surely, 2^670166881 is an apocalyptic number.

It is an amenable number.

670166881 is a deficient number, since it is larger than the sum of its proper divisors (4774943).

670166881 is a wasteful number, since it uses less digits than its factorization.

670166881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5351.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 670166881 is about 25887.5815981331. The cubic root of 670166881 is about 875.1066562777.

The spelling of 670166881 in words is "six hundred seventy million, one hundred sixty-six thousand, eight hundred eighty-one".