66898190 has 16 divisors (see below), whose sum is σ = 122689728. Its totient is φ = 26254176.

The previous prime is 66898189. The next prime is 66898201. The reversal of 66898190 is 9189866.

It is a super-2 number, since 2×66898190² = 8950735650552200, which contains 22 as substring.

It is a Curzon number.

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, 62582 + ... + 63641.

It is an arithmetic number, because the mean of its divisors is an integer number (7668108).

Almost surely, 2^66898190 is an apocalyptic number.

66898190 is a deficient number, since it is larger than the sum of its proper divisors (55791538).

66898190 is a wasteful number, since it uses less digits than its factorization.

66898190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126283.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 66898190 is about 8179.1313719734. The cubic root of 66898190 is about 405.9489812698.

The spelling of 66898190 in words is "sixty-six million, eight hundred ninety-eight thousand, one hundred ninety".