670905946 has 8 divisors (see below), whose sum is σ = 1006543584. Its totient is φ = 335391420.

The previous prime is 670905887. The next prime is 670905947. The reversal of 670905946 is 649509076.

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

It is a super-2 number, since 2×670905946² = 900229576756309832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 670905896 and 670905905.

It is not an unprimeable number, because it can be changed into a prime (670905947) 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 3 ways as a sum of consecutive naturals, for example, 15670 + ... + 39841.

It is an arithmetic number, because the mean of its divisors is an integer number (125817948).

Almost surely, 2^670905946 is an apocalyptic number.

670905946 is a deficient number, since it is larger than the sum of its proper divisors (335637638).

670905946 is a wasteful number, since it uses less digits than its factorization.

670905946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61556.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 670905946 is about 25901.8521731555. The cubic root of 670905946 is about 875.4282294630.

The spelling of 670905946 in words is "six hundred seventy million, nine hundred five thousand, nine hundred forty-six".