66361240 has 48 divisors (see below), whose sum is σ = 164132640. Its totient is φ = 24129600.

The previous prime is 66361237. The next prime is 66361249. The reversal of 66361240 is 4216366.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66361199 and 66361208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66361249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2016 + ... + 11695.

It is an arithmetic number, because the mean of its divisors is an integer number (3419430).

Almost surely, 2^66361240 is an apocalyptic number.

It is an amenable number.

66361240 is an abundant number, since it is smaller than the sum of its proper divisors (97771400).

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

66361240 is a wasteful number, since it uses less digits than its factorization.

66361240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13744 (or 13729 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 66361240 is about 8146.2408508465. The cubic root of 66361240 is about 404.8599627619.

The spelling of 66361240 in words is "sixty-six million, three hundred sixty-one thousand, two hundred forty".