666249024 has 112 divisors (see below), whose sum is σ = 2079727616. Its totient is φ = 184204800.

The previous prime is 666249013. The next prime is 666249029. The reversal of 666249024 is 420942666.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666249029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33669 + ... + 49659.

Almost surely, 2^666249024 is an apocalyptic number.

666249024 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666249024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1039863808).

666249024 is an abundant number, since it is smaller than the sum of its proper divisors (1413478592).

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

666249024 is a wasteful number, since it uses less digits than its factorization.

666249024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16044 (or 16034 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 666249024 is about 25811.8000922059. The cubic root of 666249024 is about 873.3980043920.

The spelling of 666249024 in words is "six hundred sixty-six million, two hundred forty-nine thousand, twenty-four".