66781052 has 24 divisors (see below), whose sum is σ = 131330976. Its totient is φ = 29481408.

The previous prime is 66781051. The next prime is 66781069. The reversal of 66781052 is 25018766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66781051) 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, 26723 + ... + 29114.

It is an arithmetic number, because the mean of its divisors is an integer number (5472124).

Almost surely, 2^66781052 is an apocalyptic number.

It is an amenable number.

66781052 is a deficient number, since it is larger than the sum of its proper divisors (64549924).

66781052 is a wasteful number, since it uses less digits than its factorization.

66781052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55877 (or 55875 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 66781052 is about 8171.9674497639. The cubic root of 66781052 is about 405.7119054328.

The spelling of 66781052 in words is "sixty-six million, seven hundred eighty-one thousand, fifty-two".