670842662691 has 4 divisors (see below), whose sum is σ = 894456883592. Its totient is φ = 447228441792.

The previous prime is 670842662687. The next prime is 670842662701. The reversal of 670842662691 is 196266248076.

670842662691 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 670842662691 - 2² = 670842662687 is a prime.

It is a super-2 number, since 2×670842662691² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670842662641) 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, 111807110446 + ... + 111807110451.

It is an arithmetic number, because the mean of its divisors is an integer number (223614220898).

Almost surely, 2^670842662691 is an apocalyptic number.

670842662691 is a deficient number, since it is larger than the sum of its proper divisors (223614220901).

670842662691 is a wasteful number, since it uses less digits than its factorization.

670842662691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223614220900.

The product of its (nonzero) digits is 10450944, while the sum is 57.

The spelling of 670842662691 in words is "six hundred seventy billion, eight hundred forty-two million, six hundred sixty-two thousand, six hundred ninety-one".