66663190 has 16 divisors (see below), whose sum is σ = 130902480. Its totient is φ = 24241120.

The previous prime is 66663173. The next prime is 66663217. The reversal of 66663190 is 9136666.

It is a super-2 number, since 2×66663190² = 8887961801952200, which contains 22 as substring.

It is a congruent number.

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, 302905 + ... + 303124.

It is an arithmetic number, because the mean of its divisors is an integer number (8181405).

Almost surely, 2^66663190 is an apocalyptic number.

66663190 is a deficient number, since it is larger than the sum of its proper divisors (64239290).

66663190 is a wasteful number, since it uses less digits than its factorization.

66663190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606047.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 66663190 is about 8164.7529050180. The cubic root of 66663190 is about 405.4730843194.

The spelling of 66663190 in words is "sixty-six million, six hundred sixty-three thousand, one hundred ninety".