670177421 has 4 divisors (see below), whose sum is σ = 682822332. Its totient is φ = 657532512.

The previous prime is 670177397. The next prime is 670177423. The reversal of 670177421 is 124771076.

670177421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 548074921 + 122102500 = 23411^2 + 11050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670177421 is a prime.

It is a super-2 number, since 2×670177421² = 898275551236422482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670177423) 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, 6322376 + ... + 6322481.

It is an arithmetic number, because the mean of its divisors is an integer number (170705583).

Almost surely, 2^670177421 is an apocalyptic number.

It is an amenable number.

670177421 is a deficient number, since it is larger than the sum of its proper divisors (12644911).

670177421 is a wasteful number, since it uses less digits than its factorization.

670177421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12644910.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 670177421 is about 25887.7851698441. The cubic root of 670177421 is about 875.1112439787. Note that the first 3 decimals are identical.

The spelling of 670177421 in words is "six hundred seventy million, one hundred seventy-seven thousand, four hundred twenty-one".