670263643 has 8 divisors (see below), whose sum is σ = 776805120. Its totient is φ = 566419560.

The previous prime is 670263637. The next prime is 670263647. The reversal of 670263643 is 346362076.

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

It is not a de Polignac number, because 670263643 - 2⁵ = 670263611 is a prime.

It is a super-2 number, since 2×670263643² = 898506702255262898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (670263647) 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, 673813 + ... + 674806.

It is an arithmetic number, because the mean of its divisors is an integer number (97100640).

Almost surely, 2^670263643 is an apocalyptic number.

670263643 is a deficient number, since it is larger than the sum of its proper divisors (106541477).

670263643 is a wasteful number, since it uses less digits than its factorization.

670263643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348697.

The product of its (nonzero) digits is 108864, while the sum is 37.

The square root of 670263643 is about 25889.4504190413. The cubic root of 670263643 is about 875.1487716561.

The spelling of 670263643 in words is "six hundred seventy million, two hundred sixty-three thousand, six hundred forty-three".