670551863 has 4 divisors (see below), whose sum is σ = 671329728. Its totient is φ = 669774000.

The previous prime is 670551853. The next prime is 670551877. The reversal of 670551863 is 368155076.

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

It is a cyclic number.

It is not a de Polignac number, because 670551863 - 2¹² = 670547767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 670551863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670551853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387638 + ... + 389363.

It is an arithmetic number, because the mean of its divisors is an integer number (167832432).

Almost surely, 2^670551863 is an apocalyptic number.

670551863 is a deficient number, since it is larger than the sum of its proper divisors (777865).

670551863 is an equidigital number, since it uses as much as digits as its factorization.

670551863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777864.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 670551863 is about 25895.0161807248. The cubic root of 670551863 is about 875.2741945578.

The spelling of 670551863 in words is "six hundred seventy million, five hundred fifty-one thousand, eight hundred sixty-three".