670021742 has 16 divisors (see below), whose sum is σ = 1119666240. Its totient is φ = 298576992.

The previous prime is 670021721. The next prime is 670021747. The reversal of 670021742 is 247120076.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670021747) 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, 443558 + ... + 445065.

It is an arithmetic number, because the mean of its divisors is an integer number (69979140).

Almost surely, 2^670021742 is an apocalyptic number.

670021742 is a deficient number, since it is larger than the sum of its proper divisors (449644498).

670021742 is a wasteful number, since it uses less digits than its factorization.

670021742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888667.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 670021742 is about 25884.7781910527. The cubic root of 670021742 is about 875.0434773498.

The spelling of 670021742 in words is "six hundred seventy million, twenty-one thousand, seven hundred forty-two".