66774744 has 48 divisors (see below), whose sum is σ = 186688320. Its totient is φ = 21539520.

The previous prime is 66774737. The next prime is 66774749. The reversal of 66774744 is 44747766.

It is a self number, because there is not a number n which added to its sum of digits gives 66774744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66774749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12727 + ... + 17190.

It is an arithmetic number, because the mean of its divisors is an integer number (3889340).

Almost surely, 2^66774744 is an apocalyptic number.

It is an amenable number.

66774744 is an abundant number, since it is smaller than the sum of its proper divisors (119913576).

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

66774744 is a wasteful number, since it uses less digits than its factorization.

66774744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29960 (or 29953 counting only the distinct ones).

The product of its digits is 790272, while the sum is 45.

The square root of 66774744 is about 8171.5814870807. The cubic root of 66774744 is about 405.6991307949.

The spelling of 66774744 in words is "sixty-six million, seven hundred seventy-four thousand, seven hundred forty-four".