69621066 has 32 divisors (see below), whose sum is σ = 155062080. Its totient is φ = 23154768.

The previous prime is 69621061. The next prime is 69621067. The reversal of 69621066 is 66012696.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 69621066.

It is not an unprimeable number, because it can be changed into a prime (69621061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28360 + ... + 30716.

It is an arithmetic number, because the mean of its divisors is an integer number (4845690).

Almost surely, 2^69621066 is an apocalyptic number.

69621066 is an abundant number, since it is smaller than the sum of its proper divisors (85441014).

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

69621066 is a wasteful number, since it uses less digits than its factorization.

69621066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2915 (or 2909 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 69621066 is about 8343.9238970643. The cubic root of 69621066 is about 411.3835196826.

The spelling of 69621066 in words is "sixty-nine million, six hundred twenty-one thousand, sixty-six".