66874464 has 192 divisors, whose sum is σ = 215006400. Its totient is φ = 20127744.

The previous prime is 66874463. The next prime is 66874469. The reversal of 66874464 is 46447866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66874463) 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, 425874 + ... + 426030.

It is an arithmetic number, because the mean of its divisors is an integer number (1119825).

Almost surely, 2^66874464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66874464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107503200).

66874464 is an abundant number, since it is smaller than the sum of its proper divisors (148131936).

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

66874464 is a wasteful number, since it uses less digits than its factorization.

66874464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 208 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 66874464 is about 8177.6808448361. The cubic root of 66874464 is about 405.9009845334.

The spelling of 66874464 in words is "sixty-six million, eight hundred seventy-four thousand, four hundred sixty-four".