670158391 has 8 divisors (see below), whose sum is σ = 767091584. Its totient is φ = 573524280.

The previous prime is 670158389. The next prime is 670158409. The reversal of 670158391 is 193851076.

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

It is not a de Polignac number, because 670158391 - 2¹ = 670158389 is a prime.

It is a super-2 number, since 2×670158391² = 898224538055417762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670158091) 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, 69945 + ... + 78946.

It is an arithmetic number, because the mean of its divisors is an integer number (95886448).

Almost surely, 2^670158391 is an apocalyptic number.

670158391 is a deficient number, since it is larger than the sum of its proper divisors (96933193).

670158391 is a wasteful number, since it uses less digits than its factorization.

670158391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149541.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 670158391 is about 25887.4176193764. The cubic root of 670158391 is about 875.1029608366.

The spelling of 670158391 in words is "six hundred seventy million, one hundred fifty-eight thousand, three hundred ninety-one".