66631852 has 24 divisors (see below), whose sum is σ = 133521696. Its totient is φ = 28501248.

The previous prime is 66631849. The next prime is 66631889. The reversal of 66631852 is 25813666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14598 + ... + 18610.

It is an arithmetic number, because the mean of its divisors is an integer number (5563404).

Almost surely, 2^66631852 is an apocalyptic number.

It is an amenable number.

66631852 is an abundant number, since it is smaller than the sum of its proper divisors (66889844).

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

66631852 is a wasteful number, since it uses less digits than its factorization.

66631852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4617 (or 4615 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 66631852 is about 8162.8335766448. The cubic root of 66631852 is about 405.4095374696.

It can be divided in two parts, 6663 and 1852, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 66631852 in words is "sixty-six million, six hundred thirty-one thousand, eight hundred fifty-two".