670142661 has 8 divisors (see below), whose sum is σ = 898689120. Its totient is φ = 444178992.

The previous prime is 670142633. The next prime is 670142713. The reversal of 670142661 is 166241076.

670142661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 670142661 - 2¹⁸ = 669880517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670142611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645091 + ... + 646128.

It is an arithmetic number, because the mean of its divisors is an integer number (112336140).

Almost surely, 2^670142661 is an apocalyptic number.

It is an amenable number.

670142661 is a deficient number, since it is larger than the sum of its proper divisors (228546459).

670142661 is a wasteful number, since it uses less digits than its factorization.

670142661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291395.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 670142661 is about 25887.1138020444. The cubic root of 670142661 is about 875.0961139590.

The spelling of 670142661 in words is "six hundred seventy million, one hundred forty-two thousand, six hundred sixty-one".