66212474 has 8 divisors (see below), whose sum is σ = 99818400. Its totient is φ = 32939676.

The previous prime is 66212459. The next prime is 66212477. The reversal of 66212474 is 47421266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66212474.

It is not an unprimeable number, because it can be changed into a prime (66212477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82784 + ... + 83579.

It is an arithmetic number, because the mean of its divisors is an integer number (12477300).

Almost surely, 2^66212474 is an apocalyptic number.

66212474 is a deficient number, since it is larger than the sum of its proper divisors (33605926).

66212474 is a wasteful number, since it uses less digits than its factorization.

66212474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166564.

The product of its digits is 16128, while the sum is 32.

The square root of 66212474 is about 8137.1047676677. The cubic root of 66212474 is about 404.5572034003.

The spelling of 66212474 in words is "sixty-six million, two hundred twelve thousand, four hundred seventy-four".