42664641 has 8 divisors (see below), whose sum is σ = 58273824. Its totient is φ = 27749280.

The previous prime is 42664603. The next prime is 42664651. The reversal of 42664641 is 14646624.

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

It is not a de Polignac number, because 42664641 - 2⁷ = 42664513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42664651) 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, 173311 + ... + 173556.

It is an arithmetic number, because the mean of its divisors is an integer number (7284228).

Almost surely, 2^42664641 is an apocalyptic number.

42664641 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

42664641 is a deficient number, since it is larger than the sum of its proper divisors (15609183).

42664641 is a wasteful number, since it uses less digits than its factorization.

42664641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346911.

The product of its digits is 27648, while the sum is 33.

The square root of 42664641 is about 6531.8175877775. The cubic root of 42664641 is about 349.4266558607.

The spelling of 42664641 in words is "forty-two million, six hundred sixty-four thousand, six hundred forty-one".