670731481 has 8 divisors (see below), whose sum is σ = 811641600. Its totient is φ = 541094208.

The previous prime is 670731463. The next prime is 670731491. The reversal of 670731481 is 184137076.

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 670731481 - 2⁷ = 670731353 is a prime.

It is a super-2 number, since 2×670731481² = 899761439208906722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 670731481.

It is not an unprimeable number, because it can be changed into a prime (670731421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2818081 + ... + 2818318.

It is an arithmetic number, because the mean of its divisors is an integer number (101455200).

Almost surely, 2^670731481 is an apocalyptic number.

It is an amenable number.

670731481 is a deficient number, since it is larger than the sum of its proper divisors (140910119).

670731481 is a wasteful number, since it uses less digits than its factorization.

670731481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5636423.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 670731481 is about 25898.4841448298. The cubic root of 670731481 is about 875.3523396268.

The spelling of 670731481 in words is "six hundred seventy million, seven hundred thirty-one thousand, four hundred eighty-one".