66772734 has 16 divisors (see below), whose sum is σ = 152623488. Its totient is φ = 19077912.

The previous prime is 66772733. The next prime is 66772801. The reversal of 66772734 is 43727766.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1589827 = 66772734 / (6 + 6 + 7 + 7 + 2 + 7 + 3 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66772733) 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, 794872 + ... + 794955.

It is an arithmetic number, because the mean of its divisors is an integer number (9538968).

Almost surely, 2^66772734 is an apocalyptic number.

66772734 is an abundant number, since it is smaller than the sum of its proper divisors (85850754).

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

66772734 is a wasteful number, since it uses less digits than its factorization.

66772734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589839.

The product of its digits is 296352, while the sum is 42.

The square root of 66772734 is about 8171.4584989462. The cubic root of 66772734 is about 405.6950600770.

The spelling of 66772734 in words is "sixty-six million, seven hundred seventy-two thousand, seven hundred thirty-four".