66862860 has 24 divisors (see below), whose sum is σ = 187216176. Its totient is φ = 17830080.

The previous prime is 66862849. The next prime is 66862867. The reversal of 66862860 is 6826866.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (66862867) 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, 557131 + ... + 557250.

It is an arithmetic number, because the mean of its divisors is an integer number (7800674).

Almost surely, 2^66862860 is an apocalyptic number.

66862860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66862860 is an abundant number, since it is smaller than the sum of its proper divisors (120353316).

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

66862860 is a wasteful number, since it uses less digits than its factorization.

66862860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114393 (or 1114391 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 66862860 is about 8176.9713219504. The cubic root of 66862860 is about 405.8775059777.

The spelling of 66862860 in words is "sixty-six million, eight hundred sixty-two thousand, eight hundred sixty".