66737632 has 48 divisors (see below), whose sum is σ = 142651152. Its totient is φ = 30551040.

The previous prime is 66737617. The next prime is 66737639. The reversal of 66737632 is 23673766.

Its product of digits (190512) is a multiple of the sum of its prime divisors (1323).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66737639) 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, 56407 + ... + 57577.

It is an arithmetic number, because the mean of its divisors is an integer number (2971899).

Almost surely, 2^66737632 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 66737632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71325576).

66737632 is an abundant number, since it is smaller than the sum of its proper divisors (75913520).

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

66737632 is a wasteful number, since it uses less digits than its factorization.

66737632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331 (or 1323 counting only the distinct ones).

The product of its digits is 190512, while the sum is 40.

The square root of 66737632 is about 8169.3103748113. The cubic root of 66737632 is about 405.6239571817.

The spelling of 66737632 in words is "sixty-six million, seven hundred thirty-seven thousand, six hundred thirty-two".