670017655 has 8 divisors (see below), whose sum is σ = 808464384. Its totient is φ = 533052000.

The previous prime is 670017631. The next prime is 670017683. The reversal of 670017655 is 556710076.

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

It is not a de Polignac number, because 670017655 - 2⁹ = 670017143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369271 + ... + 371080.

It is an arithmetic number, because the mean of its divisors is an integer number (101058048).

Almost surely, 2^670017655 is an apocalyptic number.

670017655 is a deficient number, since it is larger than the sum of its proper divisors (138446729).

670017655 is a wasteful number, since it uses less digits than its factorization.

670017655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740537.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 670017655 is about 25884.6992449207. The cubic root of 670017655 is about 875.0416981489.

The spelling of 670017655 in words is "six hundred seventy million, seventeen thousand, six hundred fifty-five".