66013662 has 64 divisors (see below), whose sum is σ = 158505984. Its totient is φ = 18061440.

The previous prime is 66013639. The next prime is 66013667. The reversal of 66013662 is 26631066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66013667) 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, 39508 + ... + 41144.

It is an arithmetic number, because the mean of its divisors is an integer number (2476656).

Almost surely, 2^66013662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66013662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79252992).

66013662 is an abundant number, since it is smaller than the sum of its proper divisors (92492322).

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

66013662 is a wasteful number, since it uses less digits than its factorization.

66013662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 66013662 is about 8124.8791991020. The cubic root of 66013662 is about 404.1518846945.

The spelling of 66013662 in words is "sixty-six million, thirteen thousand, six hundred sixty-two".