66851190 has 192 divisors, whose sum is σ = 215377920. Its totient is φ = 14696640.

The previous prime is 66851171. The next prime is 66851201. The reversal of 66851190 is 9115866.

It is a super-2 number, since 2×66851190² = 8938163208832200, 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 95 ways as a sum of consecutive naturals, for example, 410049 + ... + 410211.

It is an arithmetic number, because the mean of its divisors is an integer number (1121760).

Almost surely, 2^66851190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66851190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107688960).

66851190 is an abundant number, since it is smaller than the sum of its proper divisors (148526730).

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

66851190 is a wasteful number, since it uses less digits than its factorization.

66851190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 66851190 is about 8176.2577014182. The cubic root of 66851190 is about 405.8538911433.

It can be divided in two parts, 6685 and 1190, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 66851190 in words is "sixty-six million, eight hundred fifty-one thousand, one hundred ninety".