670156671 has 4 divisors (see below), whose sum is σ = 893542232. Its totient is φ = 446771112.

The previous prime is 670156639. The next prime is 670156673. The reversal of 670156671 is 176651076.

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

It is not a de Polignac number, because 670156671 - 2⁵ = 670156639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670156673) 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, 111692776 + ... + 111692781.

It is an arithmetic number, because the mean of its divisors is an integer number (223385558).

Almost surely, 2^670156671 is an apocalyptic number.

670156671 is a deficient number, since it is larger than the sum of its proper divisors (223385561).

670156671 is a wasteful number, since it uses less digits than its factorization.

670156671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223385560.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 670156671 is about 25887.3843985830. The cubic root of 670156671 is about 875.1022121686.

The spelling of 670156671 in words is "six hundred seventy million, one hundred fifty-six thousand, six hundred seventy-one".