66173802 has 16 divisors (see below), whose sum is σ = 132438240. Its totient is φ = 22042832.

The previous prime is 66173801. The next prime is 66173803. The reversal of 66173802 is 20837166.

It is an interprime number because it is at equal distance from previous prime (66173801) and next prime (66173803).

It is a super-2 number, since 2×66173802² = 8757944142270408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66173801) 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 7 ways as a sum of consecutive naturals, for example, 9088 + ... + 14660.

It is an arithmetic number, because the mean of its divisors is an integer number (8277390).

Almost surely, 2^66173802 is an apocalyptic number.

66173802 is an abundant number, since it is smaller than the sum of its proper divisors (66264438).

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

66173802 is a wasteful number, since it uses less digits than its factorization.

66173802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7557.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 66173802 is about 8134.7281454269. The cubic root of 66173802 is about 404.4784262853.

The spelling of 66173802 in words is "sixty-six million, one hundred seventy-three thousand, eight hundred two".