670703986 has 4 divisors (see below), whose sum is σ = 1006055982. Its totient is φ = 335351992.

The previous prime is 670703977. The next prime is 670703987. The reversal of 670703986 is 689307076.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 670033225 + 670761 = 25885^2 + 819^2 .

It is a super-3 number, since 3×670703986³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (670703987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167675995 + ... + 167675998.

Almost surely, 2^670703986 is an apocalyptic number.

670703986 is a deficient number, since it is larger than the sum of its proper divisors (335351996).

670703986 is a wasteful number, since it uses less digits than its factorization.

670703986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335351995.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 670703986 is about 25897.9533168164. The cubic root of 670703986 is about 875.3403784858.

The spelling of 670703986 in words is "six hundred seventy million, seven hundred three thousand, nine hundred eighty-six".