42660266646 has 64 divisors (see below), whose sum is σ = 90683089920. Its totient is φ = 13350986880.

The previous prime is 42660266641. The next prime is 42660266659. The reversal of 42660266646 is 64666206624.

It is a junction number, because it is equal to n+sod(n) for n = 42660266595 and 42660266604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42660266641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2234236 + ... + 2253248.

It is an arithmetic number, because the mean of its divisors is an integer number (1416923280).

Almost surely, 2^42660266646 is an apocalyptic number.

42660266646 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

42660266646 is an abundant number, since it is smaller than the sum of its proper divisors (48022823274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42660266646 is a wasteful number, since it uses less digits than its factorization.

42660266646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19341.

The product of its (nonzero) digits is 2985984, while the sum is 48.

The spelling of 42660266646 in words is "forty-two billion, six hundred sixty million, two hundred sixty-six thousand, six hundred forty-six".