42721310166603 has 8 divisors (see below), whose sum is σ = 57030959221248. Its totient is φ = 28446267278184.

The previous prime is 42721310166593. The next prime is 42721310166629. The reversal of 42721310166603 is 30666101312724.

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

It is not a de Polignac number, because 42721310166603 - 2⁵ = 42721310166571 is a prime.

It is a super-2 number, since 2×42721310166603² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42721310126603) 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, 8651538675 + ... + 8651543612.

It is an arithmetic number, because the mean of its divisors is an integer number (7128869902656).

Almost surely, 2^{42721310166603} is an apocalyptic number.

42721310166603 is a deficient number, since it is larger than the sum of its proper divisors (14309649054645).

42721310166603 is a wasteful number, since it uses less digits than its factorization.

42721310166603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17303083113.

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 42721310166603 in words is "forty-two trillion, seven hundred twenty-one billion, three hundred ten million, one hundred sixty-six thousand, six hundred three".